Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 5.22 | |
| 1991 | 5.41 | |
| 1992 | 5.56 | |
| 1993 | 5.68 | |
| 1994 | 5.82 | |
| 1995 | 6 | |
| 1996 | 6.01 | |
| 1997 | 5.93 | |
| 1998 | 6 | |
| 1999 | 5.91 | |
| 2000 | 5.83 | |
| 2001 | 5.7 | |
| 2002 | 5.77 | |
| 2003 | 5.71 | |
| 2004 | 5.64 | |
| 2005 | 5.51 | |
| 2006 | 5.51 | |
| 2007 | 5.47 | |
| 2008 | 5.46 | |
| 2009 | 5.54 |
