~snip
Zimbabwe was always dependent on the white population for its cricket players, since the sport is not much popular among the blacks. And the white population there declined from 296,000 (in 1975) to 28,000 (as per 2012 Census). The current population may be even lower.
If you are looking like that the cricket is invented by the English and then the sports grew where they conquered
. I am not aware of the census or the white population in Zimbabwe as majority left or forced to leave everything behind because of the political situation and you cannot expect anyone to return in that state of political climate.
Now you can't expect 28,000 people to form a cricket team and beat teams such as India and Pakistan, who have populations in excess of 1 billion and 100 million respectively. The new president (Emmerson Mnangagwa) has promised to bring back the white farmers, but I don't think that anyone will return to that country now.
If you are talking about population it does not mean that the amount of people will make a difference, you need to have an interest for the game and if you have the talent you will get selected, China has the biggest population and they do not have a cricket team
.