Population comparison: USA vs China
(millions of people)
and estimates for 2100 based on current trends
Year
USA
China
Britain
1750
1
200
10
1800
5
259
10
1850
20
429
20
1900
76
467
42
1950
152
556
50
2000
280
1300
58
2100
700
1400
55
2200
1000
1200
50