Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 7.63 | |
| 1991 | 8.79 | |
| 1992 | 10.86 | |
| 1993 | 15.4 | |
| 1994 | 19.33 | |
| 1995 | 19.1 | |
| 1996 | 20.2 | |
| 1997 | 21.98 | |
| 1998 | 23.1 | |
| 1999 | 23.9 | |
| 2000 | 25.43 | |
| 2001 | 26.15 | |
| 2002 | 26.24 | |
| 2003 | 28.18 | |
| 2004 | 30.63 | |
| 2005 | 32.68 | |
| 2006 | 36.24 | |
| 2007 | 38.67 | |
| 2008 | 47.01 | |
| 2009 | 51.54 |
