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The image displays a line graph showing "Population by age group (% of total)" for the years 1960 to 2040. For the 0-19 age group, the data points are: 1960 (31%), 1970 (26%), 1980 (26%), 1990 (21%), 2000 (15%), 2010 (14%), 2020 (13%), 2030 (12%), and 2040 (11%). For the 20-55 age group, the values are: 1960 (55%), 1970 (61%), 1980 (70%), 1990 (60%), 2000 (58%), 2010 (55%), 2020 (49%), 2030 (48%), and 2040 (45%). For the 55+ age group, the percentages are: 1960 (16%), 1970 (15%), 1980 (18%), 1990 (21%), 2000 (26%), 2010 (31%), 2020 (38%), 2030 (40%), and 2040 (55%).
Given the complexity of the image, the above description may not be entirely accurate.
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The line graph illustrates the population of specific nations by age group starting from 1960 to 2040.
Overall, it is clear that the level of different nations decreased after reaching its peak.
The age group starts with 0-19 years in the year 1960; at this time, this group was at its peak, at approximately 30, but gradually its population lowered, and in the year 1990, this group and the 55+ aged group became stable; later on, the 55+ group continuously reached its high standard, which was in fact around 60.
After all, the group which comes next consists of 20 to 55 year old individuals; in the year 1980, its population range was at its peak, that is 70 percent, but with the passage of time, its amount lowered, and between 2030 and 2040, it became equal, which will be almost 50.
Simply, the overall trend decreased with the passage of time.
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