| Año | Valor |
|---|---|
| 1990-01-01 | 15443135928.000000 |
| 1991-01-01 | 19132128300.000100 |
| 1992-01-01 | 22014006000.000000 |
| 1993-01-01 | 24458969300.000100 |
| 1994-01-01 | 27636341899.999900 |
| 1995-01-01 | 32235072900.000000 |
| 1996-01-01 | 37536646800.000000 |
| 1997-01-01 | 41643866100.000000 |
| 1998-01-01 | 46822325700.000000 |
| 1999-01-01 | 48156174800.000000 |
| 2000-01-01 | 51928492100.000000 |
| 2001-01-01 | 53790326600.000000 |
| 2002-01-01 | 56682328500.000000 |
| 2003-01-01 | 61904448600.000100 |
| 2004-01-01 | 69626113099.999900 |
| 2005-01-01 | 77023817400.000000 |
| 2006-01-01 | 91747795300.000000 |
| 2007-01-01 | 103009182400.000000 |
| 2008-01-01 | 120693764200.000000 |
| 2009-01-01 | 121726745200.000000 |
Fuente: World Bank