The given bar chart illustrates the proportion of entire population of the world in four countries over 53 year-span, included the prediction for 2050
Overall, It is clear that the share of global population has risen in country A, while the opposite trend can be observed for out of three nations, witnessed a download trend, excepted for 2050 in country C.
In 1950s, Country A accounted only for three-quarter of country B, around 15%, nonetheless eventually grown gradually over the following the year, and is forecasted to reach at the largest proportion in 2050 by 20%. Country B began with higher rate with 28% in 1950, then fell by 8% from the previous years. Even though experienced a significant decrease, still a substantial figure.
The population of country C started around 7% in 1950, before slightly reduced and stabilized at 5% from 2005 to 2050. In country D, by contrast, there was a noticeably smaller than approximately half of Country C in 1950 and reached the lowest point 1% in the end of period.