The main drivers of this trend are mass emigration, low birth rates and aging demographics. Bulgaria is expected to experience a 22.5 percent decrease, with its population dropping from 6.9 ...

Where does the U.S. sit on the list?The top 10 countries in the CIA's list for population growth are as follows: South Sudan—4.65 percent growth rate Niger—3.66 percent Angola—3.33 percent ...