This is because the population growth rate for a country is the birth rate - death rate, as a percentage per 1000. read more
By increasing the life expectancy, there is some change to the birth rate of the nation, as while there are no more children are born by having elderly people live longer, the healthcare improvements that cause this increased life expecntancy will also increase infant mortality and so it would increase birth rate. read more
Global life expectancy for both sexes increased from 65.3 years in 1990 to 71.5 years in 2013, and women made slightly greater gains than men. Female life expectancy at birth increased by 6.6 years and male life expectancy by 5.8 years. read more
The Impact of the Increase in Life Expectancy Written by Segue Technologies on May 20, 2015 Until 1998, the birth and death rates of the world’s populations were about the same, keeping the size of population stable. read more