| Año | Valor |
|---|---|
| 1960-01-01 | 4727739746.338920 |
| 1961-01-01 | 4826516221.024890 |
| 1962-01-01 | 5095783596.596940 |
| 1963-01-01 | 5442175895.494460 |
| 1964-01-01 | 5657500838.178110 |
| 1965-01-01 | 5935478857.980330 |
| 1966-01-01 | 6361087691.424150 |
| 1967-01-01 | 6762931564.581610 |
| 1968-01-01 | 7339771963.484030 |
| 1969-01-01 | 7668160504.847320 |
| 1970-01-01 | 8069284227.951540 |
| 1971-01-01 | 8477859236.601200 |
| 1972-01-01 | 9153331417.377350 |
| 1973-01-01 | 9678655892.405610 |
| 1974-01-01 | 9963166545.292810 |
| 1975-01-01 | 10691575418.028100 |
| 1976-01-01 | 11184945381.008100 |
| 1977-01-01 | 11740973137.016000 |
| 1978-01-01 | 11981979454.634100 |
| 1979-01-01 | 11997956711.045900 |
Fuente: World Bank