| Año | Valor |
|---|---|
| 1981-01-01 | 51544.562100 |
| 1982-01-01 | 50431.299775 |
| 1983-01-01 | 49357.137514 |
| 1984-01-01 | 48313.654473 |
| 1985-01-01 | 47302.252039 |
| 1986-01-01 | 46318.347606 |
| 1987-01-01 | 45351.562021 |
| 1988-01-01 | 44400.503957 |
| 1989-01-01 | 43470.376979 |
| 1990-01-01 | 42565.772182 |
| 1991-01-01 | 41687.905521 |
| 1992-01-01 | 40846.066719 |
| 1993-01-01 | 40043.830512 |
| 1994-01-01 | 39276.220145 |
| 1995-01-01 | 38541.268238 |
| 1996-01-01 | 37834.703112 |
| 1997-01-01 | 37157.653742 |
| 1998-01-01 | 36507.351871 |
| 1999-01-01 | 35875.527169 |
| 2000-01-01 | 35264.757575 |
Fuente: World Bank