| Año | Valor |
|---|---|
| 1988-12-31 | 10805500000.000000 |
| 1989-12-31 | 12693906000.000000 |
| 1990-12-31 | 15443136000.000000 |
| 1991-12-31 | 19132129000.000000 |
| 1992-12-31 | 22014007000.000000 |
| 1993-12-31 | 24458969000.000000 |
| 1994-12-31 | 27636341000.000000 |
| 1995-12-31 | 32235072000.000000 |
| 1996-12-31 | 37536646000.000000 |
| 1997-12-31 | 41643867000.000000 |
| 1998-12-31 | 46822324000.000000 |
| 1999-12-31 | 48156175000.000000 |
| 2000-12-31 | 51928493000.000000 |
| 2001-12-31 | 53790325000.000000 |
| 2002-12-31 | 56682328000.000000 |
| 2003-12-31 | 61904447000.000000 |
| 2004-12-31 | 69626113000.000000 |
| 2005-12-31 | 77023816000.000000 |
| 2006-12-31 | 91747796000.000000 |
| 2007-12-31 | 103009181000.000000 |
Fuente: World Bank