Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 0.77 | |
| 1991 | 0.98 | |
| 1992 | 1.38 | |
| 1993 | 1.91 | |
| 1994 | 3.03 | |
| 1995 | 4.55 | |
| 1996 | 6.57 | |
| 1997 | 6.89 | |
| 1998 | 6.89 | |
| 1999 | 6.93 | |
| 2000 | 7.56 | |
| 2001 | 8.02 | |
| 2002 | 9.22 | |
| 2003 | 10.22 | |
| 2004 | 11.22 | |
| 2005 | 11.63 | |
| 2006 | 12.75 | |
| 2007 | 13.41 | |
| 2008 | 14.25 | |
| 2009 | 14.77 |
