| Año | Valor |
|---|---|
| 1970-01-01 | 90000.003576 |
| 1972-01-01 | 319999.992847 |
| 1973-01-01 | 100000.001490 |
| 1974-01-01 | 1669999.957085 |
| 1975-01-01 | 990000.009537 |
| 1976-01-01 | 200000.002980 |
| 1977-01-01 | 610000.014305 |
| 1978-01-01 | 850000.023842 |
| 1979-01-01 | 1809999.942780 |
| 1980-01-01 | 1159999.966621 |
| 1981-01-01 | 1309999.942780 |
| 1982-01-01 | 50000.000745 |
| 1983-01-01 | 5059999.942780 |
| 1984-01-01 | 12270000.457764 |
| 1985-01-01 | 15119999.885559 |
| 1986-01-01 | 21950000.762940 |
| 1987-01-01 | 15460000.038147 |
| 1988-01-01 | 18809999.465942 |
| 1989-01-01 | 10600000.381470 |
| 1990-01-01 | 25500000.000000 |
Fuente: World Bank