The given chart illustrates the percentage of people who are working age adults in four countries over the period from 1960 to 2050.
Overall, there is a noticeable fluctions in the working age population porportion for four countries, while France and United states have relatively stable trends, Japan and Germany experiencing significantly fluction and decline trends in their working age adults. However, the firgues of four countries intersect from 2010 to 2015.
In 1960, United States has the lowest percentage of working age population at 60%, then it has substantial increase to 67% in 1980. After that it fluctes moderately at 66% from 1990 to 2000. Then, it peak again at 60% in 2040 and stay unchanged to 2050 . conversely, France started at 62% and go up slightly to 67% in 1990. From 1990 to 2010 it has a minor drop to around 65%. In last 40 years, it climb down significantly to 57% in 2050.
Japan began with a working age population percentage of 65% in 1960, then it hit the peak at 70% by 1990. However, there was a sharp decline to 56% in 2010, and the projection suggests a further decrease to around 52% by 2050. Germany, starting with the highest percentage of 67% in 1960, experienced a decline to 64% by 1970. After that it grow quickly in 1980 and hit the peak in 1990. in last 60 years, it has a stable reduce to 55% in 2050