These numbers come from the CIA World Factbook (lies, damn lies, and spooks with statistics - go figure). Most telling are the age distributions, with the African and Mid-East countries having significant baby-boomers below the age of 14. These same countries also have higher population growth rates than "developed" countries. To see how these numbers fit into the larger picture, read The Third Chimpanzee and Guns, Germs, & Steel. Although I've never been to Saudi Arabia, I include it because it's such a gorilla in the global economy, not to mention it's representative demographics.
| United States | Oman | Nigeria | Algeria | Saudi Arabia | Angola | Tanzania | South Africa | Portugal | |
| Population | 290,342,554 | 2,807,125 | 133,881,703 | 32,818,500 | 24,293,844 | 10,766,471 | 35,922,454 | 42,768,678 | 10,102,022 |
| Median Age | 35.8 | 19.4 | 18.0 | 22.5 | 18.8 | 18.2 | 17.5 | 24.5 | 37.6 |
| Male | 34.5 | 22.3 | 18.1 | 22.3 | 20.9 | 18.2 | 17.2 | 24 | 35.8 |
| Female | 37.1 | 16.5 | 17.9 | 22.6 | 16.8 | 18.2 | 17.7 | 25 | 39.3 |
| Population Growth Rate | 0.92% | 3.38% | 2.53% | 1.65% | 3.27% | 1.97% | 1.72% | 0.01% | 0.17% |
| Birth Rate (per 1000) | 14.14 | 37.47 | 38.75 | 21.94 | 37.2 | 45.57 | 39.5 | 18.87 | 11.45 |
| Death Rate (per 1000) | 8.44 | 3.97 | 13.76 | 5.09 | 5.79 | 25.83 | 17.38 | 18.42 | 10.21 |
| Age Distribution | |||||||||
| 0-14 years | 20.9% | 42.2% | 43.6% | 32.8% | 42.3% | 43.5% | 44.3% | 30.0% | 16.8% |
| 15-64 years | 66.7% | 55.4% | 53.6% | 63.0% | 54.8% | 53.7% | 53.1% | 65.0% | 67.2% |
| +65 years | 12.4% | 2.4% | 2.8% | 4.2% | 2.9% | 2.8% | 2.6% | 5.0% | 16.0% |
| Military Expenditures (billion) | $276.70 | $2.42 | $0.4179 | $1.87 | $18.30 | $0.2227 | $0.0197 | $1.75 | $1.29 |
| Military Expenditures (%GDP) | 3.2% | 12.2% | 1.0% | 4.1% | 13.0% | 5.4% | 0.2% | 1.7% | 2.2% |
| Internet Service Providers | 7000 | 1 | 11 | 2 | 22 | 1 | 6 | 150 | 16.0% |
| HIV/AIDS Adult Prevalence | 0.6% | 0.1% | 5.8% | 0.1% | 0.01% | 5.5% | 7.8% | 20.1% | 0.5% |
| People Living With HIV/AIDS (million) | 0.9 | 0.0013 | 3.5 | NA | NA | 0.35 | 1.5 | 5 | 0.027 |
| Oil Proved Reserves (billion barrels) | 22.45 | 5.703 | 27 | 13.1 | 261.7 | 5.691 | 0 | 0.0078 | 0 |
| Oil Production (million barrels/day) | 8.054 | 0.964 | 2.256 | 1.52 | 8.711 | 0.742 | 0 | 0.196 | 0 |
| Gas Proved Reserves (trillion m3) | 5.195 | 0.846 | 4.007 | 4.739 | 6.339 | 0.0796 | 0.0113 | 0.0142 | 0 |
| Gas Production (billion m3/day) | 548.1 | 13.77 | 15.68 | 80.3 | 53.69 | 0.53 | 0 | 1.8 | 0 |
| United States | Oman | Nigeria | Algeria | Saudi Arabia | Angola | Tanzania | South Africa | Portugal |