Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 0.02 | |
| 1991 | 0.03 | |
| 1992 | 0.03 | |
| 1993 | 0.04 | |
| 1994 | 0.07 | |
| 1995 | 0.11 | |
| 1996 | 0.21 | |
| 1997 | 0.31 | |
| 1998 | 0.41 | |
| 1999 | 0.5 | |
| 2000 | 0.56 | |
| 2001 | 0.61 | |
| 2002 | 0.73 | |
| 2003 | 0.94 | |
| 2004 | 1.12 | |
| 2005 | 1.25 | |
| 2006 | 1.38 | |
| 2007 | 1.59 | |
| 2008 | 2.01 | |
| 2009 | 2.6 |
