Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 14.88 | |
| 1991 | 16.02 | |
| 1992 | 17.32 | |
| 1993 | 18.8 | |
| 1994 | 19.87 | |
| 1995 | 20.81 | |
| 1996 | 23.44 | |
| 1997 | 25.09 | |
| 1998 | 27.03 | |
| 1999 | 27.69 | |
| 2000 | 28.44 | |
| 2001 | 31.57 | |
| 2002 | 34.05 | |
| 2003 | 35.39 | |
| 2004 | 37.08 | |
| 2005 | 40.04 | |
| 2006 | 42.67 | |
| 2007 | 48.06 | |
| 2008 | 56.68 | |
| 2009 | 58.88 |
