| Año | Valor |
|---|---|
| 1960-01-01 | 12609999.993816 |
| 1961-01-01 | 23080000.000075 |
| 1962-01-01 | 31680000.096560 |
| 1963-01-01 | 46839999.983087 |
| 1964-01-01 | 36180000.107735 |
| 1965-01-01 | 30260000.666603 |
| 1966-01-01 | 22689999.822527 |
| 1967-01-01 | 25999999.962747 |
| 1968-01-01 | 41029998.214915 |
| 1969-01-01 | 29479999.996722 |
| 1970-01-01 | 25850000.049919 |
| 1971-01-01 | 23840000.048280 |
| 1972-01-01 | 42829999.869689 |
| 1973-01-01 | 17739999.949932 |
| 1974-01-01 | 38650000.058115 |
| 1975-01-01 | 33160000.180826 |
| 1976-01-01 | 45879999.686033 |
| 1977-01-01 | 58170000.523329 |
| 1978-01-01 | 86439999.639988 |
| 1979-01-01 | 107090001.344681 |
Fuente: World Bank