| Año | Valor |
|---|---|
| 1990-01-01 | 9999.999776 |
| 1991-01-01 | 39999.999106 |
| 1992-01-01 | 340000.003576 |
| 1993-01-01 | 129999.995232 |
| 1994-01-01 | 170000.001788 |
| 1995-01-01 | 140000.000596 |
| 1996-01-01 | 939999.997616 |
| 1997-01-01 | 129999.995232 |
| 1998-01-01 | 409999.996424 |
| 1999-01-01 | 70000.000298 |
| 2000-01-01 | 119999.997318 |
| 2001-01-01 | 119999.997318 |
| 2002-01-01 | 389999.985695 |
| 2003-01-01 | 1100000.023842 |
| 2004-01-01 | 589999.973774 |
| 2005-01-01 | 1120000.004768 |
| 2006-01-01 | 970000.028610 |
| 2007-01-01 | 1080000.042915 |
| 2008-01-01 | 1100000.023842 |
| 2009-01-01 | 959999.978542 |
Fuente: World Bank