It is correct and usable in written English.
You can use it when you are referring to the total population of a particular country. For example: According to the latest census, the countries population of India is 1.3 billion.
The phrase "look on our website" is a turn-off for a significant chunk of most countries' population.
As elsewhere in the Nordic countries, population growth was rapid, and by 1908 the figure had exceeded 2,000,000.
It will put in place a new voting system that reflects countries' population size, while reducing the opportunities for individual countries to block a proposal.
No plan can ignore that in African and other less-developed countries population already outruns the present means of support yet goes on rapidly expanding.
As the Nordic countries' population ages, there will be many more openings for foreigners in medicine, the caring professions and other jobs, especially in the public sector.
Two very recent studies based on new data challenge the finding in the fourth cell that world PPP-income distribution weighted by countries' population shows little change over the past few decades.
The number was derived by simply adding together the two countries' populations.
That number was derived by simply adding together the two countries' populations.
The new voting system reflecting countries' populations gives Germany more votes than anyone else for the first time.
From Scandinavia to France, countries' populations are recovering and childbearing is increasing.
Chamie (2013) has mentioned that in 76 countries, populations will go into decline without immigration.
