Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 3.44 | |
| 1991 | 3.45 | |
| 1992 | 3.45 | |
| 1993 | 3.32 | |
| 1994 | 3.28 | |
| 1995 | 3.28 | |
| 1996 | 3.35 | |
| 1997 | 3.43 | |
| 1998 | 3.47 | |
| 1999 | 3.47 | |
| 2000 | 3.42 | |
| 2001 | 3.37 | |
| 2002 | 3.33 | |
| 2003 | 3.33 | |
| 2004 | 3.46 | |
| 2005 | 3.64 | |
| 2006 | 3.94 | |
| 2007 | 4.36 | |
| 2008 | 4.83 | |
| 2009 | 4.61 |
