The world's population has grown about one billion in the last decade. In 1960, there were roughly 3 billion humans on this planet. In a year and a half we will be seven billion. The growth rate of world’s population has been doubled in the same period, from 2.53 % - 1.17 %. There is difference between growth rates of developed and developing countries. For example Sweden has a population growth rate of 0.8% annually compared to Bangladesh's 1.4%.
The UN statisticians have showed four possible scenarios: A high, a low, a medium and a constant fertility variant. Constant fertility is population growth rates continue at the current pace. In that case we will be 11 billion by 2050. Their best case scenario prediction is 8 billion. Though, most likely situation, the medium variant, is nine billion earthlings by 2050. After that, the researchers consider that it will take us another 150 years to reach the next billion.

This post covers the list of countries by population, % of world population and by rank.

Rank	Country	Population	%  World     Population
1.	China	1,336,970,000	19.62%
2.	India	1,179,618,000	17.31%
3.	United states	309,075,000	4.54%
4.	Indonesia	231,369,500	3.39%
5.	Brazil	192,787,000	2.83%
6.	Pakistan	169,248,500	2.48%
7.	Bangladesh	162,221,000	2.38%
8.	Nigeria	154,729,000	2.27%
9.	Russia	141,927,297	2.08%
10.	Japan	127,380,000	1.87%
11.	Mexico	107,550,697	1.58%
12.	Philippines	92,226,600	1.35%
13.	Vietnam	85,789,573	1.26%
14.	Germany	81,757,600	1.20%
15.	Ethiopia	79,221,000	1.16%
16.	Egypt	78,133,000	1.15%
17.	Iran	74,196,000	1.09%
18.	Turkey	72,561,312	1.06%

 

19.	Dem. Rep. of Congo	66,020,000	0.97%
20.	France	65,447,374	0.96%
21.	Thailand	63,525,062	0.93%
22.	United Kingdom	62,041,708	0.91%
23.	Italy	60,276,969	0.88%
24.	Myanmar	50,020,000	0.73%
25.	South Korea	49,773,145	0.73%
26.	South Africa	49,320,500	0.72%
27.	Spain	45,989,016	0.67%
28.	Ukraine	45,962,900	0.67%
29.	Columbia	45,399,000	0.67%
30.	Tanzania	43,739,000	0.64%
31.	Argentina	40,134,425	0.59%
32.	Kenya	39,802,000	0.58%
33.	Sudan	39,154,490	0.57%
34.	Poland	38,163,895	0.56%
35.	Algeria	34,895,000	0.51%
36.	Canada	34,071,000	0.50%
37.	Uganda	32,710,000	0.48%
38.	Morocco	31,782,000	0.47%
39.	Iraq	30,747,000	0.45%
40.	Nepal	29,331,000	0.43%
41.	Peru	29,132,013	0.43%
42.	Venezuela	28,741,000	0.42%
43.	Malaysia	28,306,700	0.42%

44.	Afghanistan	28,150,000	0.40%
45.	Uzbekistan	27,488,000	0.40%
46.	Saudi Arabia	25,721,000	0.38%
47.	North Korea	24,051,706	0.35%
48.	Ghana	23,837,000	0.35%
49.	Yemen	23,580,000	0.35%
50.	Taiwan n4	23,131,093	0.34%
51.	Australian5	22,226,000	0.33%
52.	Syria	21,906,000	0.32%

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