| Año | Valor |
|---|---|
| 1991-01-01 | 5.635751 |
| 1992-01-01 | 10.968020 |
| 1993-01-01 | 11.505065 |
| 1994-01-01 | 18.745506 |
| 1995-01-01 | -15.561418 |
| 1996-01-01 | -16.227394 |
| 1997-01-01 | -1.184177 |
| 1998-01-01 | -15.299094 |
| 1999-01-01 | -13.748457 |
| 2000-01-01 | -13.961192 |
| 2001-01-01 | -20.849057 |
| 2002-01-01 | -18.403344 |
| 2003-01-01 | -15.700266 |
| 2004-01-01 | -15.434471 |
| 2005-01-01 | -13.681016 |
| 2006-01-01 | -13.540680 |
| 2007-01-01 | -11.352332 |
| 2008-01-01 | -8.186096 |
| 2009-01-01 | -5.069449 |
| 2010-01-01 | -1.489643 |
Fuente: World Bank