| Año | Valor |
|---|---|
| 1990-01-01 | 99.963594 |
| 1995-01-01 | 99.968609 |
| 2000-01-01 | 99.962465 |
| 2005-01-01 | 99.976213 |
| 2010-01-01 | 99.979002 |
| 2011-01-01 | 99.975298 |
| 2012-01-01 | 99.932858 |
| 2013-01-01 | 99.902186 |
| 2014-01-01 | 99.701941 |
| 2015-01-01 | 99.342416 |
| 2016-01-01 | 97.050656 |
| 2017-01-01 | 95.840220 |
Fuente: World Bank