Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 9.86 | |
| 1991 | 9.87 | |
| 1992 | 9.8 | |
| 1993 | 9.83 | |
| 1994 | 9.72 | |
| 1995 | 9.73 | |
| 1996 | 9.54 | |
| 1997 | 9.66 | |
| 1998 | 9.82 | |
| 1999 | 9.92 | |
| 2000 | 9.99 | |
| 2001 | 10.11 | |
| 2002 | 10.03 | |
| 2003 | 9.91 | |
| 2004 | 9.8 | |
| 2005 | 9.78 | |
| 2006 | 9.67 | |
| 2007 | 9.47 | |
| 2008 | 9.54 | |
| 2009 | 9.58 |
