| Año | Valor |
|---|---|
| 1961-01-01 | 9999.999776 |
| 1962-01-01 | 29999.999329 |
| 1963-01-01 | 39999.999106 |
| 1964-01-01 | 9999.999776 |
| 1965-01-01 | 19999.999553 |
| 1966-01-01 | 39999.999106 |
| 1967-01-01 | 50000.000745 |
| 1968-01-01 | 79999.998212 |
| 1969-01-01 | 59999.998659 |
| 1970-01-01 | 219999.998808 |
| 1971-01-01 | 579999.983311 |
| 1972-01-01 | 360000.014305 |
| 1973-01-01 | 730000.019073 |
| 1974-01-01 | 829999.983311 |
| 1975-01-01 | 2269999.980927 |
| 1976-01-01 | 2539999.961853 |
| 1977-01-01 | 7650000.095367 |
| 1978-01-01 | 14470000.267029 |
| 1979-01-01 | 21870000.839233 |
| 1980-01-01 | 19159999.847412 |
Fuente: World Bank