| Año | Valor |
|---|---|
| 1970-01-01 | 11000000.000000 |
| 1971-01-01 | 12000000.000000 |
| 1972-01-01 | 14000000.000000 |
| 1973-01-01 | 13000000.000000 |
| 1974-01-01 | 15000000.000000 |
| 1975-01-01 | 16400000.000000 |
| 1976-01-01 | 25000000.000000 |
| 1977-01-01 | 20000000.000000 |
| 1978-01-01 | 60000000.000000 |
| 1979-01-01 | 95000000.000000 |
| 1980-01-01 | 92000000.000000 |
| 1981-01-01 | 80000000.000000 |
| 1982-01-01 | 128800000.000000 |
| 1983-01-01 | 376000000.000000 |
| 1984-01-01 | 340000000.000000 |
| 1985-01-01 | 555000000.000000 |
| 1986-01-01 | 555000000.000000 |
| 1987-01-01 | 200000000.000000 |
| 1988-01-01 | 200000000.000000 |
| 1989-01-01 | 200000000.000000 |
Fuente: World Bank