Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 9.09 | |
| 1991 | 9.01 | |
| 1992 | 8.85 | |
| 1993 | 8.76 | |
| 1994 | 8.81 | |
| 1995 | 8.78 | |
| 1996 | 8.75 | |
| 1997 | 8.68 | |
| 1998 | 8.6 | |
| 1999 | 8.69 | |
| 2000 | 8.68 | |
| 2001 | 8.92 | |
| 2002 | 8.79 | |
| 2003 | 9.14 | |
| 2004 | 9 | |
| 2005 | 9.08 | |
| 2006 | 8.87 | |
| 2007 | 8.79 | |
| 2008 | 8.64 | |
| 2009 | 8.72 |
