| Año | Valor |
|---|---|
| 1996-01-01 | 73.385291 |
| 1997-01-01 | 68.740102 |
| 1998-01-01 | 68.242673 |
| 1999-01-01 | 69.912792 |
| 2000-01-01 | 72.106345 |
| 2001-01-01 | 60.451785 |
| 2002-01-01 | 66.317988 |
| 2003-01-01 | 75.369179 |
| 2004-01-01 | 74.915588 |
| 2005-01-01 | 75.960060 |
| 2006-01-01 | 56.589721 |
| 2007-01-01 | 40.099073 |
| 2008-01-01 | 35.327025 |
| 2009-01-01 | 34.682959 |
| 2010-01-01 | 30.790313 |
| 2011-01-01 | 26.904690 |
| 2012-01-01 | 25.995061 |
| 2013-01-01 | 28.317714 |
| 2014-01-01 | 28.385040 |
| 2015-01-01 | 31.045628 |
Fuente: World Bank