Haiti is the eighty-fifth most populous country in the world, with an estimated population of 11,123,178 as of July 2018. However the last census done in Haiti was in 2003, and the population recorded was 8,812,245. According to population DNA tests, approximately 80% of the population of Haiti is Afro-Haitian. Within Black Haitian DNA the composition is approximately 95% African, 5% European or mixed European. This is evidenced in DNA ancestry read outs where the average Haitian consistently tests at nearly 100 percent SSA DNA. The remaining population of Haiti is primarily composed of Mulattoes, Europeans, Asians, and Arabs. Hispanic residents in Haiti are mostly Cuban and Dominican. About two-thirds of Haitian people live in rural areas.
Demographic features of the population of Rwanda include population density, ethnicity, education higher level, health of the populace, economic status, religious affiliations and other aspects.
Demographic features of the population of Seychelles include population density, ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects of the population.
In demography, demographic transition is a phenomenon and theory which refers to the historical shift from high birth rates and high death rates in societies with minimal technology, education and economic development, to low birth rates and low death rates in societies with advanced technology, education and economic development, as well as the stages between these two scenarios. In economic growth, the demographic transition has swept the world over the past two centuries, and the unprecedented population growth of the post-Malthusian period was reversed, reducing birth rates and population growth significantly in all regions of the world, and enabling economies to translate more of the gains of factor accumulation and technological progress into per capita income growth. The demographic transition strengthens economic growth process by three changes: (i) reduced dilution of capital and land stock, (ii) increased investment in human capital, and (iii) increased size of the labor force relative to the total population and changed age population distribution. Although this shift has occurred in many industrialized countries, the theory and model are frequently imprecise when applied to individual countries due to specific social, political and economic factors affecting particular populations.
Population decline, also known as depopulation, is a reduction in a human population size. Throughout history, Earth's total human population has continued to grow; however, current projections suggest that this long-term trend of steady population growth may be coming to an end.
Population ageing is an increasing median age in a population because of declining fertility rates and rising life expectancy. Most countries have rising life expectancy and an ageing population, trends that emerged first in developed countries but are now seen in virtually all developing countries. That is the case for every country in the world except the 18 countries designated as "demographic outliers" by the United Nations. The aged population is currently at its highest level in human history. The UN predicts the rate of population ageing in the 21st century will exceed that of the previous century. The number of people aged 60 years and over has tripled since 1950 and reached 600 million in 2000 and surpassed 700 million in 2006. It is projected that the combined senior and geriatric population will reach 2.1 billion by 2050. Countries vary significantly in terms of the degree and pace of ageing, and the UN expects populations that began ageing later will have less time to adapt to its implications.
A population pyramid or "age-sex pyramid" is a graphical illustration of the distribution of a population by age groups and sex; it typically takes the shape of a pyramid when the population is growing. Males are usually shown on the left and females on the right, and they may be measured in absolute numbers or as a percentage of the total population. The pyramid can be used to visualize the age of a particular population. It is also used in ecology to determine the overall age distribution of a population; an indication of the reproductive capabilities and likelihood of the continuation of a species. Number of people per unit area of land is called population density.
The net migration rate is the difference between the number of immigrants and the number of emigrants divided by the population. When the number of immigrants is larger than the number of emigrants, a positive net migration rate occurs. A positive net migration rate indicates that there are more people entering than leaving an area. When more emigrate from a country, the result is a negative net migration rate, meaning that more people are leaving than entering the area. When there is an equal number of immigrants and emigrants, the net migration rate is balanced.
The pensions crisis or pensions timebomb is the predicted difficulty in paying for corporate or government employment retirement pensions in various countries, due to a difference between pension obligations and the resources set aside to fund them. The basic difficulty of the pension problem is that institutions must be sustained over far longer than the political planning horizon. Shifting demographics are causing a lower ratio of workers per retiree; contributing factors include retirees living longer, and lower birth rates. An international comparison of pension institution by countries is important to solve the pension crisis problem. There is significant debate regarding the magnitude and importance of the problem, as well as the solutions. One aspect and challenge of the "Pension timebomb" is that several countries' governments have a constitutional obligation to provide public services to its citizens, but the funding of these programs, such as healthcare are at a lack of funding, especially after the 2008 recession and the strain caused on the dependency ratio by an ageing population and a shrinking workforce, which increases costs of elderly care.
The Demographic Window is defined to be that period of time in a nation's demographic evolution when the proportion of population of working age group is particularly prominent. This occurs when the demographic architecture of a population becomes younger and the percentage of people able to work reaches its height. Typically, the demographic window of opportunity lasts for 30–40 years depending upon the country. Because of the mechanical link between fertility levels and age structures, the timing and duration of this period is closely associated to those of fertility decline: when birth rates fall, the age pyramid first shrinks with gradually lower proportions of young population and the dependency ratio decreases as is happening in various parts of East Asia over several decades. After a few decades, low fertility however causes the population to get older and the growing proportion of elderly people inflates again the dependency ratio as is observed in present-day Europe.
Demographic dividend, as defined by the United Nations Population Fund (UNFPA), is "the economic growth potential that can result from shifts in a population’s age structure, mainly when the share of the working-age population is larger than the non-working-age share of the population ". In other words, it is "a boost in economic productivity that occurs when there are growing numbers of people in the workforce relative to the number of dependents". UNFPA stated that "a country with both increasing numbers of young people and declining fertility has the potential to reap a demographic dividend."
The ageing of Europe, also known as the greying of Europe, is a demographic phenomenon in Europe characterised by a decrease in fertility, a decrease in mortality rate, and a higher life expectancy among European populations. Low birth rates and higher life expectancy contribute to the transformation of Europe's population pyramid shape. The most significant change is the transition towards a much older population structure, resulting in a decrease in the proportion of the working age while the number of the retired population increases. The total number of the older population is projected to increase greatly within the coming decades, with rising proportions of the post-war baby-boom generations reaching retirement. This will cause a high burden on the working age population as they provide for the increasing number of the older population.
Japan has the highest proportion of elderly citizens of any country in the world. 2014 estimates showed that about 38% of the Japanese population was above the age of 60, and 25.9% was above the age of 65, a figure that increased to 29.1% by 2022. By 2050, an estimated one-third of the population in Japan is expected to be 65 and older.
In demography, replacement migration is a theory of migration needed for a region to achieve a particular objective. Generally, studies using this concept have as an objective to avoid the decline of total population and the decline of the working-age population.
Fiscal sustainability, or public finance sustainability, is the ability of a government to sustain its current spending, tax and other policies in the long run without threatening government solvency or defaulting on some of its liabilities or promised expenditures. There is no consensus among economists on a precise operational definition for fiscal sustainability, rather different studies use their own, often similar, definitions. However, the European Commission defines public finance sustainability as: the ability of a government to sustain its current spending, tax and other policies in the long run without threatening the government's solvency or without defaulting on some of the government's liabilities or promised expenditures. Many countries and research institutes have published reports which assess the sustainability of fiscal policies based on long-run projections of country's public finances. These assessments attempt to determine whether an adjustment to current fiscal policies that is required to reconcile projected revenues with projected expenditures. The size of the required adjustment is given with measures such as the Fiscal gap. In empirical works, weak and strong fiscal sustainability are distinguished. Differences are related to both econometric techniques used for examination and variables involved.
China's population is aging faster than almost all other countries in modern history. In 2050, the proportion of Chinese over retirement age will become 39 percent of the total population according to projections. China is rapidly aging at an earlier stage of its development than other countries. Current demographic trends could hinder economic growth and create challenging social issues in China.
Population decline has many potential effects on individual and national economy. The single best gauge of economic success is growth in GDP per capita, not GDP. GDP per capita is an approximate indicator of average living standards, for individual prosperity. Therefore, whether population decline has a positive or negative economic impact on a country's citizens depends on the rate of growth of GDP per capita, or alternatively, GDP growth relative to the rate of decline in the population.
In South Korea, aging refers to an increase in the proportion of senior citizens to the total population. The term "senior citizens" include those aged 65 or older. According to Article 3 no.1 of the Framework Act on Low Birthrate of an Aging Society, the term "aging population" refers to the increasing proportion of elderly people in the entire population.
The societal effects of negligible senescence considers a scenario where negligible senescence is achieved on a societal wide level in humans. There is much controversy about the realistic timeline of such a scenario. The predictions vary in time starting from 2037 till later than the 21st century. The effects of negligible senescence has a profound impact on economy, climate, demographics and impacts social structures. The baseline scenario ceteris paribus of negligible senescence is more population growth while a larger healthier labor force would spur economic growth.
