| Año | Valor |
|---|---|
| 2000-01-01 | 26.611825 |
| 2001-01-01 | 26.641539 |
| 2002-01-01 | 26.402984 |
| 2003-01-01 | 26.108717 |
| 2004-01-01 | 25.818436 |
| 2005-01-01 | 25.532663 |
| 2006-01-01 | 25.247393 |
| 2007-01-01 | 24.966623 |
| 2008-01-01 | 24.696519 |
| 2009-01-01 | 24.436708 |
| 2010-01-01 | 24.187316 |
| 2011-01-01 | 23.947458 |
| 2012-01-01 | 23.717977 |
| 2013-01-01 | 23.516725 |
| 2014-01-01 | 23.337076 |
| 2015-01-01 | 23.166501 |
| 2016-01-01 | 23.004345 |
| 2017-01-01 | 22.851389 |
| 2018-01-01 | 22.705366 |
| 2019-01-01 | 22.537735 |
Fuente: World Bank