Table 1 | ||||||
| Continent | Annual runoff | Water resources per caput | ||||
Volume | Percent of total | Specific discharge (litre/km2) | 1960 | 1980 | 2000 | |
| Africa | 4 570 | 10 | 4.8 | 16.5 | 9.4 | 5.1 |
| Asia | 14 410 | 32 | 10.5 | 7.9 | 5.1 | 3.3. |
| Australia | 348 | 1 | 1.4 | 28.4 | 19.8 | 15.0 |
| Europe | 3 210 | 7 | 9.7 | 5.4 | 4.6 | 4.1 |
| North and Central America | 8 200 | 18 | 10.7 | 30.2 | 21.3 | 17.5 |
| Oceania | 2 040 | 5 | 51.1 | 132.0 | 92.4 | 73.5 |
| South America | 11 760 | 27 | 21.0 | 80.2 | 48.8 | 28.3 |
| World | 44 538 | 100 | 10.4 | 13.7 | 9.7 | 7.1 |
| Sources: Ayibotele, 1992; Gleick, 1993; Shiklomanov, 1996. | ||||||
