COMPARISONS OF THE US, CHINA, MEXICO, AND THE WORLD
CIA World Factbook Data US/World
Country United States China Mexico World Ratio
Land area, sq km 9,161,923 9,326,410 1,923,040 148,940,000 0.06
Arable, % 18.01 14.86 12.66 13.31 1.35
Arable land, sq km 1,650,062 1,385,905 243,457 19,823,914 0.08
Population, millions 298.44 1,313.97 107.45 6,525.17 0.05
Population/sq km of arable land 180.87 948.10 441.35 329.16 0.55
Population ages 0-14, % 20.40 20.80 30.60 27.40 0.74
Population ages 15-64, % 67.20 71.40 63.60 62.50 1.08
Population ages 65+, % 12.50 7.70 5.80 7.40 1.69
Workers per dependent 2.04 2.51 1.75 1.80 1.14
Median age, years 36.50 32.70 25.30 27.60 1.32
Births/1000 population/year 14.14 13.25 20.69 20.05 0.71
Deaths/1000 population/year 8.26 6.97 4.74 8.67 0.95
Migrants/1000 population/year 3.18 (0.39) (4.32) 0.00
Net growth/1000 pop/yr = B-D+M 9.06 5.89 11.63 11.38 0.80
Net growth rate = 1+(B-D+M)/1000 1.0091 1.0059 1.0116 1.0114 1.00
Population doubling time, T2, years 76.85 118.03 59.95 61.26 1.25
Life expectancy at birth, years 77.85 72.58 75.41 64.77 1.20
Fertility, Births/woman 2.09 1.73 2.42 2.59 0.81
Dominant culture or religion Christian Buddhist Christian LA NA
GDP (PPP), $US, billions 12,360 8,859 1,067 60,710 0.20
Gini Index of Income Distribution 45.00 44.00 54.60 NA
EIA qradrillion Btu used per year 100.41 59.57 6.61 446.44 0.22
Estimated food used, Quad/year 1.01 4.47 0.37 22.19 0.05
Total energy used, Quad/year 101.43 64.04 6.97 468.63 0.22
Food Energy/Total Energy, % 1.00 6.98 5.24 4.73 0.21
Energy used, Btu/person/year 339,859 48,738 64,909 71,818 4.73
GDP/Capita, $US/person/year 41,415 6,742 9,930 9,304 4.45
Energy efficiency, GDP/Quad, $bill/Quad 121.86 138.33 152.99 129.55 0.94
Country United States China Mexico World US/World
Ratio
Notes:
1. Population doubling time in years, T2 = log(2)/log(net growth rate).
2. GDP = gross domestic product (Purchasing Power Parity)
3. The Gini Index of income distribution varies from about 25 (most uniform) to 50 (least uniform).
     The European Union has a Gini Index of 32 indicating broad welfare programs.