| Año | Valor |
|---|---|
| 1980-01-01 | 2054.797269 |
| 1981-01-01 | 2015.245761 |
| 1982-01-01 | 1894.059473 |
| 1983-01-01 | 1778.787435 |
| 1984-01-01 | 1737.687278 |
| 1985-01-01 | 1672.789782 |
| 1986-01-01 | 1595.835034 |
| 1987-01-01 | 1601.018347 |
| 1988-01-01 | 1613.048471 |
| 1989-01-01 | 1639.113340 |
| 1990-01-01 | 1679.408479 |
| 1991-01-01 | 1731.395142 |
| 1992-01-01 | 1724.363345 |
| 1993-01-01 | 1762.668309 |
| 1994-01-01 | 1809.570651 |
| 1995-01-01 | 1858.781852 |
| 1996-01-01 | 1904.287021 |
| 1997-01-01 | 1962.864043 |
| 1998-01-01 | 2025.503347 |
| 1999-01-01 | 1998.945340 |
Fuente: World Bank