| Año | Valor |
|---|---|
| 1960-01-01 | 5800000.000000 |
| 1961-01-01 | 6400000.000000 |
| 1962-01-01 | 1000000.000000 |
| 1963-01-01 | 8400000.000000 |
| 1964-01-01 | 17830000.000000 |
| 1965-01-01 | 29850000.000000 |
| 1966-01-01 | 33880000.000000 |
| 1967-01-01 | 28590000.000000 |
| 1968-01-01 | 28600000.000000 |
| 1969-01-01 | 30300000.000000 |
| 1970-01-01 | 32820000.000000 |
| 1971-01-01 | 39649150.429020 |
| 1972-01-01 | 44257152.166828 |
| 1973-01-01 | 54929832.924338 |
| 1974-01-01 | 176220040.162618 |
| 1975-01-01 | 139529730.055758 |
| 1976-01-01 | 151063977.431962 |
| 1977-01-01 | 211088440.814208 |
| 1978-01-01 | 169768527.098242 |
| 1979-01-01 | 178200000.000000 |
Fuente: World Bank