| Año | Valor |
|---|---|
| 1990-01-01 | 16285334761.560800 |
| 1991-01-01 | 17722750387.517400 |
| 1992-01-01 | 18425080624.869700 |
| 1993-01-01 | 19667081616.696700 |
| 1994-01-01 | 21024526972.965500 |
| 1995-01-01 | 22469554059.244700 |
| 1996-01-01 | 23878833796.335300 |
| 1997-01-01 | 25494019474.351400 |
| 1998-01-01 | 27077132708.131500 |
| 1999-01-01 | 27577524724.930000 |
| 2000-01-01 | 28909467542.125500 |
| 2001-01-01 | 30058157187.820900 |
| 2002-01-01 | 31283984731.674200 |
| 2003-01-01 | 32766590619.562900 |
| 2004-01-01 | 35051931465.398300 |
| 2005-01-01 | 37749359760.991600 |
| 2006-01-01 | 40780171855.784400 |
| 2007-01-01 | 43796805026.617600 |
| 2008-01-01 | 47385371261.035000 |
| 2009-01-01 | 49278173098.845100 |
Fuente: World Bank