| Año | Valor |
|---|---|
| 1974-01-01 | 19999.999553 |
| 1983-01-01 | 129999.995232 |
| 1984-01-01 | 109999.999404 |
| 1985-01-01 | 100000.001490 |
| 1986-01-01 | 129999.995232 |
| 1987-01-01 | 39999.999106 |
| 1988-01-01 | 140000.000596 |
| 1989-01-01 | 9999.999776 |
| 1990-01-01 | 50000.000745 |
| 1991-01-01 | 29999.999329 |
| 1992-01-01 | 170000.001788 |
| 1993-01-01 | 59999.998659 |
| 1994-01-01 | 19999.999553 |
| 1995-01-01 | 319999.992847 |
| 1996-01-01 | 330000.013113 |
| 1997-01-01 | 560000.002384 |
| 1998-01-01 | 349999.994040 |
| 1999-01-01 | 300000.011921 |
| 2000-01-01 | 219999.998808 |
| 2001-01-01 | 280000.001192 |
Fuente: World Bank