| Año | Valor |
|---|---|
| 1987-01-01 | 29999.999329 |
| 1988-01-01 | 9999.999776 |
| 1989-01-01 | 19999.999553 |
| 1992-01-01 | 39999.999106 |
| 1994-01-01 | 9999.999776 |
| 1995-01-01 | 29999.999329 |
| 1996-01-01 | 59999.998659 |
| 1997-01-01 | 79999.998212 |
| 1998-01-01 | 50000.000745 |
| 1999-01-01 | 39999.999106 |
| 2000-01-01 | 50000.000745 |
| 2001-01-01 | 29999.999329 |
| 2002-01-01 | 389999.985695 |
| 2003-01-01 | 140000.000596 |
| 2004-01-01 | 150000.005960 |
| 2005-01-01 | 119999.997318 |
| 2006-01-01 | 540000.021458 |
| 2007-01-01 | 1250000.000000 |
| 2008-01-01 | 1210000.038147 |
| 2009-01-01 | 1169999.957085 |
Fuente: World Bank