Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 17.51 | |
| 1991 | 17.87 | |
| 1992 | 17.97 | |
| 1993 | 17.98 | |
| 1994 | 18.46 | |
| 1995 | 19.79 | |
| 1996 | 19.68 | |
| 1997 | 20.27 | |
| 1998 | 21.64 | |
| 1999 | 22.47 | |
| 2000 | 22.21 | |
| 2001 | 22.04 | |
| 2002 | 22.41 | |
| 2003 | 23.16 | |
| 2004 | 24.62 | |
| 2005 | 25.49 | |
| 2006 | 26.37 | |
| 2007 | 27.97 | |
| 2008 | 29.34 | |
| 2009 | 31.04 |
