Notes: 
1. Poor countries, and families, could double their income per person by having two children instead of six.
2. These models explain about 40% of the variance in GDP/capita.
3. Thus about 60% of the variance in GDP/capita is explained by other variables such as, personal rewards
     for performance and creativity in the country's economic and political systems.
CIA World Factbook Data for Countries of at least 15 Million Population
Sorted by Births/Woman
Model Model Model
2 workers+ 1 worker+ 1 worker+
PPP Est. GDP/pop Ave. kids kids 1 adult+
Dominant GDP Pop. $US per Births/ kids
No. Country Culture $Billions Millions pers./yr woman % % %
Income/worker 9,326 100.00 100.00 100.00
0.00 100.00 100.00 50.00
0 1.00 66.67 50.00 33.33
1 Ukraine Orthodox 340.40 46.71 7,287 1.17 63.09 46.08 31.55
2 Poland Christian 514.00 38.54 13,338 1.25 61.54 44.44 30.77
3 Korea, South Buddhist 965.30 48.85 19,762 1.27 61.16 44.05 30.58
4 Italy Christian 1,698.00 58.13 29,209 1.28 60.98 43.86 30.49
5 Russia Orthodox 1,589.00 142.89 11,120 1.28 60.98 43.86 30.49
6 Spain Christian 1,029.00 40.40 25,472 1.28 60.98 43.86 30.49
7 Romania Orthodox 183.60 22.30 8,232 1.37 59.35 42.19 29.67
8 Germany Christian 2,504.00 82.42 30,380 1.39 59.00 41.84 29.50
9 Japan Buddhist 4,018.00 127.46 31,523 1.40 58.82 41.67 29.41
10 Taiwan Buddhist 631.20 23.04 27,400 1.57 56.02 38.91 28.01
11 Canada Christian 1,114.00 33.10 33,657 1.61 55.40 38.31 27.70
12 Thailand Buddhist 560.70 64.63 8,675 1.64 54.95 37.88 27.47
13 Netherlands Christian 499.80 16.49 30,307 1.66 54.64 37.59 27.32
14 United Kingdom Christian 1,830.00 60.61 30,193 1.66 54.64 37.59 27.32
15 China Buddhist 8,859.00 1,313.97 6,742 1.73 53.62 36.63 26.81
16 Australia Christian 640.10 20.26 31,588 1.76 53.19 36.23 26.60
17 Iran Muslim 561.60 68.69 8,176 1.80 52.63 35.71 26.32
18 France Christian 1,816.00 60.88 29,831 1.84 52.08 35.21 26.04
19 Sri Lanka Buddhist 85.34 20.22 4,220 1.84 52.08 35.21 26.04
20 Algeria Muslim 233.20 32.93 7,082 1.89 51.41 34.60 25.71
21 Kazakhstan Muslim 124.30 15.23 8,160 1.89 51.41 34.60 25.71
22 Brazil Christian LA 1,556.00 188.08 8,273 1.91 51.15 34.36 25.58
23 Vietnam Buddhist 232.20 84.40 2,751 1.91 51.15 34.36 25.58
24 Turkey Muslim 572.00 70.41 8,123 1.92 51.02 34.25 25.51
25 Myanmar Buddhist 78.74 47.38 1,662 1.98 50.25 33.56 25.13
26 Chile Christian LA 187.10 16.13 11,596 2.00 50.00 33.33 25.00
27 United States Christian 12,360.00 298.44 41,415 2.09 48.90 32.36 24.45
28 Korea, North Buddhist 40.00 23.11 1,731 2.10 48.78 32.26 24.39
29 Argentina Christian LA 518.10 39.92 12,978 2.16 48.08 31.65 24.04
30 South Africa African 533.20 44.19 12,067 2.20 47.62 31.25 23.81
31 Venezuela Christian LA 153.70 25.73 5,973 2.23 47.28 30.96 23.64
32 Indonesia Muslim 865.60 245.45 3,527 2.40 45.45 29.41 22.73
33 Mexico Christian LA 1,067.00 107.45 9,930 2.42 45.25 29.24 22.62
34 Peru Christian LA 164.50 28.30 5,812 2.51 44.35 28.49 22.17
35 Colombia Christian LA 337.50 43.59 7,742 2.54 44.05 28.25 22.03
36 Morocco Muslim 138.30 33.24 4,160 2.68 42.74 27.17 21.37
37 India Hindu 3,611.00 1,095.35 3,297 2.73 42.28 26.81 21.14
38 Egypt Muslim 303.50 78.89 3,847 2.83 41.41 26.11 20.70
39 Uzbekistan Muslim 48.24 27.31 1,767 2.91 40.73 25.58 20.37
40 Malaysia Muslim 290.20 24.39 11,900 3.04 39.68 24.75 19.84
41 Bangladesh Muslim 304.30 147.37 2,065 3.11 39.14 24.33 19.57
42 Philippines Christian 451.30 89.47 5,044 3.11 39.14 24.33 19.57
43 Syria Muslim 72.33 18.88 3,831 3.40 37.04 22.73 18.52
44 Ghana African 54.45 22.41 2,430 3.99 33.39 20.04 16.69
45 Pakistan Muslim 393.40 165.80 2,373 4.00 33.33 20.00 16.67
46 Saudi Arabia Muslim 338.00 27.02 12,509 4.00 33.33 20.00 16.67
47 Nepal Hindu 39.90 28.29 1,411 4.10 32.79 19.61 16.39
48 Iraq Muslim 94.10 26.78 3,513 4.18 32.36 19.31 16.18
49 Cameroon African 40.83 17.34 2,355 4.39 31.30 18.55 15.65
50 Cote d'Ivoire African 28.52 17.65 1,615 4.50 30.77 18.18 15.38
51 Mozambique African 26.03 19.69 1,322 4.62 30.21 17.79 15.11
52 Sudan Muslim 85.65 41.24 2,077 4.72 29.76 17.48 14.88
53 Kenya African 37.15 34.71 1,070 4.91 28.94 16.92 14.47
54 Tanzania African 27.07 37.45 723 4.97 28.69 16.75 14.35
55 Ethiopia Muslim 62.88 74.78 841 5.22 27.70 16.08 13.85
56 Nigeria African 174.10 131.86 1,320 5.49 26.70 15.41 13.35
57 Madagascar African 16.36 18.60 880 5.62 26.25 15.11 13.12
58 Congo, Dem. R. African 40.67 62.66 649 6.45 23.67 13.42 11.83
59 Yemen Muslim 19.37 21.46 903 6.58 23.31 13.19 11.66
60 Afghanistan Muslim 21.50 31.06 692 6.69 23.01 13.00 11.51
61 Uganda African 48.73 28.20 1,728 6.71 22.96 12.97 11.48
Sum or Average 55,230.06 5,922.24 9,326 2.92
Others 5,479.94 602.93 9,089
World 60,710.00 6,525.17 9,304 2.59
Sample/World, % 90.97 90.76
With 2 kids, Ugandans could increase income per person by factors of 2.18 2.57 2.18
With 1 child, Ugandans could increase income per person by factors of 2.90 3.86 2.90
Correlations:
GDP/capita, R 1.000 (0.579) 0.633 0.638 0.633
R^2 = 0.335 0.400 0.407 0.400
Notes: 
1. Poor countries, and families, could double their income per person by having two children instead of six.
2. These models explain about 40% of the variance in GDP/capita based on R^2.
3. Thus about 60% of the variance in GDP/capita is explained by other variables such as, personal rewards
     for performance and creativity in the country's economic and political systems.