| Año | Valor |
|---|---|
| 1960-01-01 | 5.391821 |
| 1961-01-01 | 5.774820 |
| 1962-01-01 | 12.165116 |
| 1963-01-01 | 5.619322 |
| 1964-01-01 | 3.152057 |
| 1965-01-01 | 2.267156 |
| 1966-01-01 | 2.533584 |
| 1967-01-01 | 2.948491 |
| 1968-01-01 | 3.026292 |
| 1969-01-01 | 3.302480 |
| 1970-01-01 | 3.437547 |
| 1971-01-01 | 3.340094 |
| 1972-01-01 | 3.099568 |
| 1973-01-01 | 1.879045 |
| 1974-01-01 | 1.079984 |
| 1975-01-01 | 1.704554 |
| 1976-01-01 | 2.393866 |
| 1977-01-01 | 2.064506 |
| 1978-01-01 | 2.295340 |
| 1979-01-01 | 1.575409 |
Fuente: World Bank