Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1992 | 1.63 | |
| 1993 | 3 | |
| 1994 | 4.32 | |
| 1995 | 5.41 | |
| 1996 | 6.64 | |
| 1997 | 7.04 | |
| 1998 | 7.55 | |
| 1999 | 7.91 | |
| 2000 | 8.01 | |
| 2001 | 8.46 | |
| 2002 | 8.41 | |
| 2003 | 8.46 | |
| 2004 | 8.55 | |
| 2005 | 8.79 | |
| 2006 | 8.12 | |
| 2007 | 9.86 | |
| 2008 | 10.09 | |
| 2009 | 9.68 |
