!!!Did you know this about Zimbabwe? Did you know that Zimbabwe is among the top 10 of the 193 UN countries in the following 3 respects. #Population growth rate - %: 4.36 (Rank 2). #Net migration rate - migrant(s)/1,000 population: 21.78 (Rank 3). #Age Structure: 15-24 years - %: 22.1 (Rank 7).