| Año | Valor |
|---|---|
| 2000-01-01 | 9.095194 |
| 2001-01-01 | 8.984910 |
| 2002-01-01 | 10.213323 |
| 2003-01-01 | 12.465705 |
| 2004-01-01 | 15.834218 |
| 2005-01-01 | 17.707966 |
| 2006-01-01 | 22.870911 |
| 2007-01-01 | 22.716057 |
| 2008-01-01 | 24.498831 |
| 2009-01-01 | 19.789437 |
| 2010-01-01 | 23.870304 |
| 2011-01-01 | 25.518561 |
| 2012-01-01 | 27.056624 |
| 2013-01-01 | 25.971778 |
| 2014-01-01 | 22.355503 |
| 2015-01-01 | 14.085024 |
| 2016-01-01 | 13.632338 |
| 2017-01-01 | 15.323922 |
| 2018-01-01 | 15.463978 |
| 2019-01-01 | 13.412229 |
Fuente: World Bank