Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 13.63 | |
| 1991 | 15.11 | |
| 1992 | 17.18 | |
| 1993 | 17.94 | |
| 1994 | 18.95 | |
| 1995 | 19.84 | |
| 1996 | 21.05 | |
| 1997 | 21.39 | |
| 1998 | 23.43 | |
| 1999 | 24.64 | |
| 2000 | 24.43 | |
| 2001 | 24.39 | |
| 2002 | 24.74 | |
| 2003 | 25.57 | |
| 2004 | 25.61 | |
| 2005 | 26.47 | |
| 2006 | 27.58 | |
| 2007 | 28.45 | |
| 2008 | 30.38 | |
| 2009 | 34.03 |
