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2013 (MMXIII) was a common year starting on Tuesday of the Gregorian calendar, the 2013th year of the Common Era (CE) and Anno Domini (AD) designations, the 13th year of the 3rd millennium and the 21st century, and the 4th year of the 2010s decade.
2013 was the first year since 1987 (after 26 years) to contain four unique digits, or no repeating numbers. [1]
2013 was designated as:
It turns out that we had double-counted some patients who were transferred from 1 hospital to another, so we reviewed our spreadsheets and cleaned up the duplicates