The United Kingdom Census 2001 showed a total resident population for Leicester of 279,921, a 0.5% decrease from the 1991 census (this trend since reversing at the 2011 census). Approximately 62,000 were aged under 16, 199,000 were aged 16–74, and 19,000 aged 75 and over. 76.9% of Leicesters population claim they have been born in the UK, according to the 2001 UK Census. Mid-year estimates for 2006 indicate that the population of the City of Leicester stood at 289,700 making Leicester the most populous city in East Midlands.

Based on the above article, answer a question. Which age group populated the city least, those aged under 16, aged 16–74, aged 75 and over?
aged 75 and over