Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 15 | |
| 1991 | 15.22 | |
| 1992 | 15.38 | |
| 1993 | 15.43 | |
| 1994 | 15.8 | |
| 1995 | 16.27 | |
| 1996 | 16.72 | |
| 1997 | 17.26 | |
| 1998 | 18.35 | |
| 1999 | 18.01 | |
| 2000 | 17.7 | |
| 2001 | 17.49 | |
| 2002 | 17.34 | |
| 2003 | 17.26 | |
| 2004 | 17.27 | |
| 2005 | 17.47 | |
| 2006 | 17.7 | |
| 2007 | 17.6 | |
| 2008 | 17.88 | |
| 2009 | 17.79 |
