| Año | Valor |
|---|---|
| 1980-01-01 | 11833371991.066900 |
| 1981-01-01 | 11865986701.725800 |
| 1982-01-01 | 11398616583.329900 |
| 1983-01-01 | 10937870662.802300 |
| 1984-01-01 | 10915922108.406400 |
| 1985-01-01 | 10732928705.491300 |
| 1986-01-01 | 10456675549.282600 |
| 1987-01-01 | 10714274143.171000 |
| 1988-01-01 | 11026005730.832000 |
| 1989-01-01 | 11443905787.912300 |
| 1990-01-01 | 11974420933.715700 |
| 1991-01-01 | 12605057005.510100 |
| 1992-01-01 | 12812599040.093500 |
| 1993-01-01 | 13359606833.349600 |
| 1994-01-01 | 13983135100.936200 |
| 1995-01-01 | 14637304837.904100 |
| 1996-01-01 | 15275687754.507000 |
| 1997-01-01 | 16032477212.793800 |
| 1998-01-01 | 16838807367.908700 |
| 1999-01-01 | 16910689781.900200 |
Fuente: World Bank