India is the most populous country in the world with one-sixth of the world's population. According to UN estimates, India overtook China in having the largest population in the world with a population of 1,425,775,850 at the end of April 2023.
The population of the United Kingdom was estimated at over 67.0 million in 2020. It is the 21st most populated country in the world and has a population density of 270 people per square kilometre, with England having significantly greater density than Wales, Scotland, and Northern Ireland. Almost a third of the population lives in south east England, which is predominantly urban and suburban, with about 9 million in the capital city, London, whose population density is just over 5,200 per square kilometre.
Demographic features of the population of Zambia include population density, ethnicity, education level, health of the populace, economic status, religious affiliations and others aspects of the population.
The United States had an official estimated resident population of 334,914,895 on July 1, 2023, according to the U.S. Census Bureau. This figure includes the 50 states and the District of Columbia but excludes the population of five unincorporated U.S. territories as well as several minor island possessions. The United States is the third most populous country in the world. The Census Bureau showed a population increase of 0.4% for the twelve-month period ending in July 2022, below the world average annual rate of 0.9%. The total fertility rate in the United States estimated for 2022 is 1.665 children per woman, which is below the replacement fertility rate of approximately 2.1.
Birth rate, also known as natality, is the total number of live human births per 1,000 population for a given period divided by the length of the period in years. The number of live births is normally taken from a universal registration system for births; population counts from a census, and estimation through specialized demographic techniques. The birth rate is used to calculate population growth. The estimated average population may be taken as the mid-year population.
The Total Fertility Rate (TFR) of a population is the average number of children that are born to a woman over her lifetime if:
- they were to experience the exact current age-specific fertility rates (ASFRs) through their lifetime
- and they were to live from birth until the end of their reproductive life.
Sub-replacement fertility is a total fertility rate (TFR) that leads to each new generation being less populous than the older, previous one in a given area. The United Nations Population Division defines sub-replacement fertility as any rate below approximately 2.1 children born per woman of childbearing age, but the threshold can be as high as 3.4 in some developing countries because of higher mortality rates. Taken globally, the total fertility rate at replacement was 2.33 children per woman in 2003. This can be "translated" as 2 children per woman to replace the parents, plus a "third of a child" to make up for the higher probability of males born and mortality prior to the end of a person's fertile life. In 2020, the average global fertility rate was around 2.4 children born per woman.
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.
Punjab is home to 2.3% of India's population; with a density of 551 persons per km2. According to the provisional results of the 2011 national census, Punjab has a population of 27,743,338, making it the 16th most populated state in India. Of which male and female are 14,639,465 and 13,103,873 respectively. 32% of Punjab's population consists of Dalits. In the state, the rate of population growth is 13.9% (2011), lower than national average. Out of total population, 37.5% people live in urban regions. The total figure of population living in urban areas is 10,399,146 of which 5,545,989 are males and while remaining 4,853,157 are females. The urban population in the last 10 years has increased by 37.5%. According to the 2011 Census of India, Punjab, India has a population of around 27.7 million.
Despite India's 50% increase in GDP since 2013, more than one third of the world's malnourished children live in India. Among these, half of the children under three years old are underweight.
Family planning in India is based on efforts largely sponsored by the Indian government. From 1965 to 2009, contraceptive usage has more than tripled and the fertility rate has more than halved, but the national fertility rate in absolute numbers remains high, causing concern for long-term population growth. India adds up to 1,000,000 people to its population every 20 days. Extensive family planning has become a priority in an effort to curb the projected population of two billion by the end of the twenty-first century.
Earth has a human population of over 8 billion as of 2024, with an overall population density of 50 people per km2. Nearly 60% of the world's population lives in Asia, with almost 2.8 billion in the countries of China and India combined. The percentage shares of China, India and rest of South Asia of the world population have remained at similar levels for the last few thousand years of recorded history. The world's literacy rate has increased dramatically in the last 40 years, from 66.7% in 1979 to 86.3% today. Lower literacy levels are mostly attributable to poverty. Lower literacy rates are found mostly in South Asia and Sub-Saharan Africa.
Population projections are attempts to show how the human population statistics might change in the future. These projections are an important input to forecasts of the population's impact on this planet and humanity's future well-being. Models of population growth take trends in human development and apply projections into the future. These models use trend-based-assumptions about how populations will respond to economic, social and technological forces to understand how they will affect fertility and mortality, and thus population growth.
The health care system in Kolkata consists of 48 government hospitals, mostly under the Department of Health & Family Welfare, Government of West Bengal, and 366 private medical establishments during 2010.
Child marriage in India, according to the Indian law, is a marriage where the woman and man both are younger than 21 years of age respectively. Most child marriages involve women, many of whom are poor socio-economic conditions.
Fertility factors are determinants of the number of children that an individual is likely to have. Fertility factors are mostly positive or negative correlations without certain causations.
Rattan Chand is an Indian Health Economist and former senior bureaucrat who has served Government of India at various positions for more than 35 years. Apart from working at senior positions in Government of India he has also been a resource person to USAID, World Bank, International Monetary Fund (IMF), United Nations, World Health Organization, Ministry of Health and Family Welfare Government of India and many other organisations. He has represented Government of India at many International Meetings, Conferences, Working Sessions, Seminars worldwide mainly in the Health Sector. He is a National Monitor, National Health Mission and member of working group of National Statistical Commission, Government of India and senior adviser and expert for World Bank.
Health in Punjab involves the state of complete physical, mental and social well-being of the people in Punjab, India. Data of medical facilities, diseases and nutrition is used to determine the state of health of the population.
