World Development Report 2021 - Figure 1.1

The dataset includes data on the world's population since 1850 up to 2010. 17 data points are for each decade within that time frame. The counted values for each decade's census is also in the dataset including it's percentage relative to the total world population.
Figure Note: The shaded area represents the world’s population; the bars indicate the percentage of the population that was enumerated each decade.