Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1993 | 9.46 | |
| 1994 | 20.9 | |
| 1995 | 23.66 | |
| 1996 | 23.55 | |
| 1997 | 23.31 | |
| 1998 | 23.08 | |
| 1999 | 22.3 | |
| 2000 | 22.99 | |
| 2001 | 23.52 | |
| 2002 | 23.69 | |
| 2003 | 23.42 | |
| 2004 | 23.57 | |
| 2005 | 23.03 | |
| 2006 | 22.97 | |
| 2007 | 23.38 | |
| 2008 | 23.54 | |
| 2009 | 22.15 |
