Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 0.31 | |
| 1991 | 0.81 | |
| 1992 | 0.98 | |
| 1993 | 1.06 | |
| 1994 | 1.07 | |
| 1995 | 1.08 | |
| 1996 | 1.05 | |
| 1997 | 1.03 | |
| 1998 | 1.02 | |
| 1999 | 0.99 | |
| 2000 | 0.95 | |
| 2001 | 0.91 | |
| 2002 | 1.13 | |
| 2003 | 1.25 | |
| 2004 | 1.28 | |
| 2005 | 1.35 | |
| 2006 | 1.45 | |
| 2007 | 1.54 | |
| 2008 | 1.61 | |
| 2009 | 1.71 |
