| Año | Valor |
|---|---|
| 1990-01-01 | 5035526.309423 |
| 1991-01-01 | 72330468.446024 |
| 1992-01-01 | 53744745.140878 |
| 1993-01-01 | 40887018.089030 |
| 1994-01-01 | 220338295.134211 |
| 1995-01-01 | 361964474.859779 |
| 1996-01-01 | 489301194.943535 |
| 1997-01-01 | 554599725.612710 |
| 1998-01-01 | 667707365.640374 |
| 1999-01-01 | 334773170.073202 |
| 2000-01-01 | 174703982.969181 |
| 2001-01-01 | 321588590.612615 |
| 2002-01-01 | 411653051.455064 |
| 2003-01-01 | 529753002.644589 |
| 2004-01-01 | 598618523.645187 |
| 2005-01-01 | 641670494.627846 |
| 2006-01-01 | 1276818189.484180 |
| 2007-01-01 | 1942466865.861220 |
| 2008-01-01 | 2979637356.182900 |
| 2009-01-01 | 2707244691.805880 |
Fuente: World Bank