In the 1970s. . .
I remember at school learning that the world’s population was around 3,6 billion–that was in the 1970s. Things have changed quite a lot since then, but it is likely that some of the poverty and other demographic ratios shown in the video are relatively unchanged.
View the video below (I came across it on Facebook) for an interesting schematic sense of how those ratios would look if there were just 100 people living on earth.