| Año | Valor |
|---|---|
| 1980-01-01 | 4450360000.000000 |
| 1981-01-01 | 5778480000.000000 |
| 1982-01-01 | 5600390625.000000 |
| 1983-01-01 | 5414008620.689660 |
| 1984-01-01 | 6169304528.061220 |
| 1985-01-01 | 5377276656.765800 |
| 1986-01-01 | 3959383519.827180 |
| 1987-01-01 | 4347956337.932210 |
| 1988-01-01 | 4597611710.198350 |
| 1989-01-01 | 4715973437.436730 |
| 1990-01-01 | 4867582597.513120 |
| 1991-01-01 | 5343262457.102260 |
| 1992-01-01 | 5643868748.681260 |
| 1993-01-01 | 5734699488.849340 |
| 1994-01-01 | 5981222858.827270 |
| 1995-01-01 | 6715161732.226580 |
| 1996-01-01 | 7396949126.356850 |
| 1997-01-01 | 7925736821.450340 |
| 1998-01-01 | 8497494652.125460 |
| 1999-01-01 | 8285064434.568260 |
Fuente: World Bank