the supplied illustration illustrate comparison of the percentage of the proportion of the population in aged 65 and over between in USA,Sweden and japan from 1940 to 2011.At the first glance,Initially,1940,only 5%,7% of population in japan and Sweden while the majority 9% in USA.
It is crystal clear,this trend gradually changed over the years,with the percentage of population of 65 aged and over ages are surpassing those japan 2040.By 2000 USA and Sweden proportion of population identically compared to the 15%.the most substantial increase in japan 65 aged and over age people occurred between 2030 and 2040,where Japanese jumped from 10% to 27%
Conversely,the percentage of population in Sweden exhibited a consistent up ward trend to 1940 to 2040.The highest proportion of population of USA was in 1940 at 9%,which steadily rises to 15% in 1980 to 2019,with a 2% decrease in USA population.
All in all,the data reveals a significant shift overtime with an increasing trend in tree different countries proportion of the population aged 65 and over age,over the 1940 to 2040 observed period.