| Año | Valor |
|---|---|
| 1990-01-01 | 2284.012683 |
| 1991-01-01 | 2434.347096 |
| 1992-01-01 | 2479.710288 |
| 1993-01-01 | 2594.877374 |
| 1994-01-01 | 2720.803789 |
| 1995-01-01 | 2853.394103 |
| 1996-01-01 | 2976.766350 |
| 1997-01-01 | 3121.245299 |
| 1998-01-01 | 3257.049132 |
| 1999-01-01 | 3259.829448 |
| 2000-01-01 | 3359.095105 |
| 2001-01-01 | 3434.144157 |
| 2002-01-01 | 3514.914263 |
| 2003-01-01 | 3620.337722 |
| 2004-01-01 | 3808.218004 |
| 2005-01-01 | 4032.726398 |
| 2006-01-01 | 4282.871648 |
| 2007-01-01 | 4521.679320 |
| 2008-01-01 | 4810.278583 |
| 2009-01-01 | 4919.810319 |
Fuente: World Bank