| Año | Valor |
|---|---|
| 1991-01-01 | 19920000.076294 |
| 1992-01-01 | 32409999.847412 |
| 1993-01-01 | 26790000.915527 |
| 1994-01-01 | 27959999.084473 |
| 1995-01-01 | 23690000.534058 |
| 1996-01-01 | 35150001.525879 |
| 1997-01-01 | 36310001.373291 |
| 1998-01-01 | 29600000.381470 |
| 1999-01-01 | 30079999.923706 |
| 2000-01-01 | 25360000.610352 |
| 2001-01-01 | 26709999.084473 |
| 2002-01-01 | 22600000.381470 |
| 2003-01-01 | 73139999.389648 |
| 2004-01-01 | 36590000.152588 |
| 2005-01-01 | 39380001.068115 |
| 2006-01-01 | 52009998.321533 |
| 2007-01-01 | 43860000.610352 |
| 2008-01-01 | 43790000.915527 |
| 2009-01-01 | 77830001.831055 |
| 2010-01-01 | 64690002.441406 |
Fuente: World Bank