| Año | Valor |
|---|---|
| 2000-01-01 | 3.360000 |
| 2001-01-01 | 3.510000 |
| 2002-01-01 | 4.080000 |
| 2003-01-01 | 4.070000 |
| 2004-01-01 | 3.970000 |
| 2005-01-01 | 4.190000 |
| 2006-01-01 | 4.070000 |
| 2007-01-01 | 3.980000 |
| 2008-01-01 | 3.820000 |
| 2009-01-01 | 3.850000 |
| 2010-01-01 | 4.010000 |
| 2011-01-01 | 4.090000 |
| 2012-01-01 | 4.220000 |
| 2013-01-01 | 3.990000 |
| 2014-01-01 | 4.160000 |
| 2015-01-01 | 3.980000 |
| 2016-01-01 | 4.030000 |
| 2017-01-01 | 4.030000 |
| 2018-01-01 | 3.940000 |
| 2019-01-01 | 3.870000 |
Fuente: World Bank