| Año | Valor |
|---|---|
| 1990-01-01 | 0.265885 |
| 1995-01-01 | 0.610523 |
| 2000-01-01 | 2.526180 |
| 2005-01-01 | 19.135346 |
| 2010-01-01 | 20.064474 |
| 2011-01-01 | 8.376705 |
| 2012-01-01 | 4.961751 |
| 2013-01-01 | 4.968632 |
| 2014-01-01 | 2.705644 |
| 2015-01-01 | 1.339796 |
| 2016-01-01 | 0.000000 |
| 2017-01-01 | 0.000000 |
Fuente: World Bank