Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 23.86 | |
| 1991 | 30.72 | |
| 1992 | 36.32 | |
| 1993 | 42.49 | |
| 1994 | 49.58 | |
| 1995 | 62.51 | |
| 1996 | 75.1 | |
| 1997 | 86.61 | |
| 1998 | 97.38 | |
| 1999 | 105.73 | |
| 2000 | 114.34 | |
| 2001 | 120.38 | |
| 2002 | 123.3 | |
| 2003 | 128.78 | |
| 2004 | 135.18 | |
| 2005 | 136.48 | |
| 2006 | 137.76 | |
| 2007 | 144.01 | |
| 2008 | 144.69 | |
| 2009 | 145.51 |
