Table 2.

Eight most populous countries in 2016 and their prospective population by 2050 (adapted from [44,46]).

S#	Country	Population in 2016 (Million)	Population in 2050 (Million)	Difference (Million)	Variation (%)
1	China	1378	1344	−34	−2.47
2	India	1329	1708	379	28.51
3	United States	324	398	74	22.83
4	Indonesia	259	360	101	38.99
5	Brazil	206	226	20	9.71
6	Pakistan	203	344	141	69.45
7	Nigeria	187	398	211	112.83
8	Bangladesh	168	202	34	20.23
	Total	4054	4980	926	22.84