| Año | Valor |
|---|---|
| 1960-01-01 | 13000000.000000 |
| 1961-01-01 | 23000000.000000 |
| 1962-01-01 | 29000000.000000 |
| 1963-01-01 | 44000000.000000 |
| 1964-01-01 | 33000000.000000 |
| 1965-01-01 | 29280000.686646 |
| 1966-01-01 | 21239999.771118 |
| 1967-01-01 | 24329999.923706 |
| 1968-01-01 | 37759998.321533 |
| 1969-01-01 | 25000000.000000 |
| 1970-01-01 | 20000000.000000 |
| 1971-01-01 | 20000000.000000 |
| 1972-01-01 | 38000000.000000 |
| 1973-01-01 | 11000000.000000 |
| 1974-01-01 | 24000000.000000 |
| 1975-01-01 | 11000000.000000 |
| 1976-01-01 | 17000000.000000 |
| 1977-01-01 | 23000000.000000 |
| 1978-01-01 | 45000000.000000 |
| 1979-01-01 | 46000000.000000 |
Fuente: World Bank