Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 9.08 | |
| 1991 | 9.68 | |
| 1992 | 9.59 | |
| 1993 | 10.04 | |
| 1994 | 10.09 | |
| 1995 | 10.17 | |
| 1996 | 10.04 | |
| 1997 | 10.04 | |
| 1998 | 10.03 | |
| 1999 | 9.89 | |
| 2000 | 9.63 | |
| 2001 | 9.83 | |
| 2002 | 9.85 | |
| 2003 | 9.82 | |
| 2004 | 9.6 | |
| 2005 | 9.6 | |
| 2006 | 9.43 | |
| 2007 | 9.18 | |
| 2008 | 9.04 | |
| 2009 | 9.24 |
