India Home to Youngest Population

It is noted that the number of older people in a country's population is mainly an outcome of past fertility patterns together with life expectancy for the country, while recent fertility patterns influence the relative proportions of younger and older people. Past major events like war also influence numbers and proportions.

In the most aged countries also the population aged 90 and above represents a very tiny proportion of the total population. At 1,131 Japan had considerably the highest number of persons aged 90 and over per 100,000 population in 2011.

In 2012 in Sweden there were 988 persons aged 90 and over per 100,000 population and in Italy the equivalent figure was 908. However, Germany (592) and Iceland (480) had lower than average numbers of persons aged 90 and over per 100,000 population.

Further, Australia, New Zealand and the U.S. have lower numbers of persons aged 90 and over per 100,000 population than many countries in Western Europe.  Africa was noted to be the least aged region of the world due to both higher fertility and much lower life expectancy. The average number of persons aged 90 and over in Africa is 26 per 100,000.

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