| Año | Valor |
|---|---|
| 1980-01-01 | 40000000.000000 |
| 1981-01-01 | 23000000.000000 |
| 1982-01-01 | 30000000.000000 |
| 1983-01-01 | 59000000.000000 |
| 1984-01-01 | 36000000.000000 |
| 1985-01-01 | 65000000.000000 |
| 1986-01-01 | 103000000.000000 |
| 1987-01-01 | 77000000.000000 |
| 1988-01-01 | 70000000.000000 |
| 1989-01-01 | 69000000.000000 |
| 1990-01-01 | 84000000.000000 |
| 1991-01-01 | 81000000.000000 |
| 1992-01-01 | 133000000.000000 |
| 1993-01-01 | 101000000.000000 |
| 1994-01-01 | 89000000.000000 |
| 1995-01-01 | 89000000.000000 |
| 1996-01-01 | 94000000.000000 |
| 1997-01-01 | 163000000.000000 |
| 1998-01-01 | 92309997.558594 |
| 1999-01-01 | 112910003.662109 |
Fuente: World Bank