| Año | Valor |
|---|---|
| 1970-01-01 | 79999.998212 |
| 1971-01-01 | 109999.999404 |
| 1972-01-01 | 310000.002384 |
| 1973-01-01 | 349999.994040 |
| 1974-01-01 | 579999.983311 |
| 1975-01-01 | 1000000.000000 |
| 1976-01-01 | 1110000.014305 |
| 1977-01-01 | 2200000.047684 |
| 1978-01-01 | 1529999.971390 |
| 1979-01-01 | 2000000.000000 |
| 1980-01-01 | 3150000.095367 |
| 1981-01-01 | 2650000.095367 |
| 1982-01-01 | 1649999.976158 |
| 1983-01-01 | 9020000.457764 |
| 1984-01-01 | 7480000.019073 |
| 1985-01-01 | 4829999.923706 |
| 1986-01-01 | 11500000.000000 |
| 1987-01-01 | 13680000.305176 |
| 1988-01-01 | 22350000.381470 |
| 1989-01-01 | 36369998.931885 |
Fuente: World Bank