Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 1.39 | |
| 1991 | 1.61 | |
| 1992 | 1.76 | |
| 1993 | 1.85 | |
| 1994 | 1.95 | |
| 1995 | 2.09 | |
| 1996 | 2.28 | |
| 1997 | 2.33 | |
| 1998 | 2.47 | |
| 1999 | 2.47 | |
| 2000 | 2.5 | |
| 2001 | 2.47 | |
| 2002 | 2.45 | |
| 2003 | 2.48 | |
| 2004 | 2.52 | |
| 2005 | 2.57 | |
| 2006 | 2.6 | |
| 2007 | 2.74 | |
| 2008 | 3.01 | |
| 2009 | 3.13 |
