Life Expectancy trend in three of the largest countries in terms of population over time October 06, 2017 aaaamegaecosystem ammaecosystem china expectancy india lifeexpectancy srikanthskidambi srikanthsrinivasankidambi ssk usa val-u-pro VidDom/ITube /IUTube / UITube / WeTube & OurTube +