| Año | Valor |
|---|---|
| 1991-01-01 | 1970000.028610 |
| 1992-01-01 | 4380000.114441 |
| 1993-01-01 | 4849999.904633 |
| 1994-01-01 | 4500000.000000 |
| 1995-01-01 | 6760000.228882 |
| 1996-01-01 | 15210000.038147 |
| 1997-01-01 | 14670000.076294 |
| 1998-01-01 | 18540000.915527 |
| 1999-01-01 | 21370000.839233 |
| 2000-01-01 | 20879999.160767 |
| 2001-01-01 | 26420000.076294 |
| 2002-01-01 | 30549999.237061 |
| 2003-01-01 | 28680000.305176 |
| 2004-01-01 | 28479999.542236 |
| 2005-01-01 | 26159999.847412 |
| 2006-01-01 | 25870000.839233 |
| 2007-01-01 | 34000000.000000 |
| 2008-01-01 | 36220001.220703 |
| 2009-01-01 | 34319999.694824 |
| 2010-01-01 | 40500000.000000 |
Fuente: World Bank