Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 1 | |
| 1991 | 1 | |
| 1992 | 1 | |
| 1993 | 1 | |
| 1994 | 1 | |
| 1995 | 1 | |
| 1996 | 1 | |
| 1997 | 1 | |
| 1998 | 1 | |
| 1999 | 1 | |
| 2000 | 1 | |
| 2001 | 1 | |
| 2002 | 1 | |
| 2003 | 1 | |
| 2004 | 1 | |
| 2005 | 1 | |
| 2006 | 1 | |
| 2007 | 1 | |
| 2008 | 1 | |
| 2009 | 1 |
