Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 1.63 | |
| 1991 | 2.12 | |
| 1992 | 2.28 | |
| 1993 | 2.29 | |
| 1994 | 2.4 | |
| 1995 | 2.57 | |
| 1996 | 2.37 | |
| 1997 | 2.37 | |
| 1998 | 2.4 | |
| 1999 | 2.53 | |
| 2000 | 2.46 | |
| 2001 | 2.2 | |
| 2002 | 2.2 | |
| 2003 | 2.53 | |
| 2004 | 2.55 | |
| 2005 | 2.75 | |
| 2006 | 2.99 | |
| 2007 | 3.41 | |
| 2008 | 4.74 | |
| 2009 | 5.16 |
