Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 9.99 | |
| 1991 | 10.71 | |
| 1992 | 11.39 | |
| 1993 | 12.16 | |
| 1994 | 13.32 | |
| 1995 | 14.56 | |
| 1996 | 15.61 | |
| 1997 | 16.99 | |
| 1998 | 17.77 | |
| 1999 | 18.11 | |
| 2000 | 18.28 | |
| 2001 | 18.34 | |
| 2002 | 18.65 | |
| 2003 | 18.76 | |
| 2004 | 19.64 | |
| 2005 | 20.71 | |
| 2006 | 21.65 | |
| 2007 | 22.65 | |
| 2008 | 26.24 | |
| 2009 | 29.93 |
