| Año | Valor |
|---|---|
| 1988-01-01 | 5599999.904633 |
| 1989-01-01 | 5230000.019073 |
| 1990-01-01 | 19899999.618530 |
| 1991-01-01 | 8239999.771118 |
| 1992-01-01 | 47189998.626709 |
| 1993-01-01 | 49040000.915527 |
| 1994-01-01 | 19790000.915527 |
| 1995-01-01 | 14369999.885559 |
| 1996-01-01 | 38919998.168945 |
| 1997-01-01 | 12560000.419617 |
| 1998-01-01 | 43310001.373291 |
| 1999-01-01 | 14819999.694824 |
| 2000-01-01 | 22440000.534058 |
| 2001-01-01 | 29690000.534058 |
| 2002-01-01 | 30760000.228882 |
| 2003-01-01 | 51610000.610352 |
| 2004-01-01 | 54540000.915527 |
| 2005-01-01 | 66680000.305176 |
| 2006-01-01 | 51599998.474121 |
| 2007-01-01 | 74629997.253418 |
Fuente: World Bank