Table # 1
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|---|---|---|---|---|---|---|---|---|---|
| 1985 | 1987 | 1988 | 1990 | 1993 | 1998 | 2000 | 2003 | 2006 | |
| World | 4.845 | 5.026 | 5.128 | 5.321 | 5.506 | 5.926 | 6.067 | 6.314 | 6.555 |
| Developed World |
1.174 | 1.191 | 1.198 | 1.214 | 1,230 | 1.178 | 1.184 | 1.202 | 1.216 |
| Developing World |
3.671 | 3.836 | 3.931 | 4.107 | 4,276 | 4.748 | 4.883 | 5.112 | 5.339 |
| Ratio | 3.13 | 3.22 | 3.28 | 3.38 | 3.48 | 4.03 | 4.12 | 4.26 | 4.39 |
Source: Population
Reference Bureau Data Sheets: Chart created by Russ Long |
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