| Año | Valor |
|---|---|
| 2000-01-01 | 18.450000 |
| 2001-01-01 | 19.600000 |
| 2002-01-01 | 21.100000 |
| 2003-01-01 | 22.500000 |
| 2004-01-01 | 24.200000 |
| 2005-01-01 | 26.200000 |
| 2006-01-01 | 28.200000 |
| 2007-01-01 | 30.300000 |
| 2008-01-01 | 32.700000 |
| 2009-01-01 | 35.100000 |
| 2010-01-01 | 37.600000 |
| 2011-01-01 | 40.200000 |
| 2012-01-01 | 42.900000 |
| 2013-01-01 | 45.600000 |
| 2014-01-01 | 48.200000 |
| 2015-01-01 | 50.800000 |
| 2016-01-01 | 53.500000 |
| 2017-01-01 | 56.000000 |
| 2018-01-01 | 58.300000 |
| 2019-01-01 | 60.600000 |
Fuente: World Bank