| Año | Valor |
|---|---|
| 1981-01-01 | 21.886352 |
| 1982-01-01 | 248.172019 |
| 1983-01-01 | 121.597161 |
| 1984-01-01 | 962.003425 |
| 1985-01-01 | 11046.930972 |
| 1986-01-01 | 182.895231 |
| 1987-01-01 | 48.935129 |
| 1988-01-01 | 29.892635 |
| 1989-01-01 | 38.171013 |
| 1990-01-01 | 43.729019 |
| 1991-01-01 | 46.909726 |
| 1992-01-01 | 44.036440 |
| 1993-01-01 | 40.937985 |
| 1994-01-01 | 26.086829 |
| 1995-01-01 | 13.655477 |
| 1996-01-01 | 31.085373 |
| 1997-01-01 | 23.349241 |
| 1998-01-01 | 25.113045 |
| 1999-01-01 | 4.047492 |
| 2000-01-01 | -2.036350 |
Fuente: World Bank