Population growth in three African countries compared with three European countries

Stumbled upon this very interesting Google tool that allows you to graphically view publicly available data. I made one visualisation that compares population growth over the past 50 years in three African countries (Kenya, Nigeria, and South Africa) and three European countries (Germany, Italy, and Netherlands)

What I find fascinating is that population in the African countries has more than doubled whereas in the European countries it has been relatively stable over this time period

See the graph below