| Año | Valor |
|---|---|
| 2000-01-01 | 58.715407 |
| 2001-01-01 | 53.363258 |
| 2002-01-01 | 50.740181 |
| 2003-01-01 | 47.661225 |
| 2004-01-01 | 42.426976 |
| 2005-01-01 | 39.603253 |
| 2006-01-01 | 35.174718 |
| 2007-01-01 | 34.343998 |
| 2008-01-01 | 31.492648 |
| 2009-01-01 | 34.018305 |
| 2010-01-01 | 36.023443 |
| 2011-01-01 | 36.750092 |
| 2012-01-01 | 38.963868 |
| 2013-01-01 | 40.926948 |
| 2014-01-01 | 43.746744 |
| 2015-01-01 | 51.446939 |
| 2016-01-01 | 57.406520 |
| 2017-01-01 | 58.615652 |
| 2018-01-01 | 62.626342 |
| 2019-01-01 | 65.838206 |
Fuente: World Bank