Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 2.86 | |
| 1991 | 2.84 | |
| 1992 | 2.93 | |
| 1993 | 3.26 | |
| 1994 | 3.95 | |
| 1995 | 4.49 | |
| 1996 | 4.72 | |
| 1997 | 4.74 | |
| 1998 | 4.63 | |
| 1999 | 4.47 | |
| 2000 | 4.33 | |
| 2001 | 4.25 | |
| 2002 | 4.15 | |
| 2003 | 4.1 | |
| 2004 | 4.15 | |
| 2005 | 4.09 | |
| 2006 | 4.02 | |
| 2007 | 4.09 | |
| 2008 | 4.17 | |
| 2009 | 4.16 |
