Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 8.1 | |
| 1991 | 8.85 | |
| 1992 | 9.6 | |
| 1993 | 9.92 | |
| 1994 | 10.66 | |
| 1995 | 11.43 | |
| 1996 | 12.1 | |
| 1997 | 12.67 | |
| 1998 | 14.13 | |
| 1999 | 14.47 | |
| 2000 | 14.56 | |
| 2001 | 14.68 | |
| 2002 | 15.08 | |
| 2003 | 15.31 | |
| 2004 | 15.47 | |
| 2005 | 15.6 | |
| 2006 | 15.99 | |
| 2007 | 16.54 | |
| 2008 | 17.26 | |
| 2009 | 19.2 |
