| Año | Valor |
|---|---|
| 1996-01-01 | 10.097270 |
| 1997-01-01 | 7.534585 |
| 1998-01-01 | 7.982673 |
| 1999-01-01 | 18.387414 |
| 2000-01-01 | 13.809484 |
| 2001-01-01 | 11.736508 |
| 2002-01-01 | 11.793384 |
| 2003-01-01 | 9.209355 |
| 2004-01-01 | 9.168944 |
| 2005-01-01 | 6.450573 |
| 2006-01-01 | 7.147516 |
| 2007-01-01 | 7.588862 |
| 2008-01-01 | 8.258090 |
| 2009-01-01 | 9.513560 |
| 2010-01-01 | 9.490678 |
| 2011-01-01 | 7.194424 |
| 2012-01-01 | 8.952124 |
| 2013-01-01 | 9.214755 |
| 2014-01-01 | 0.204751 |
| 2015-01-01 | 0.225951 |
Fuente: World Bank