Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 0.03 | |
| 1991 | 0.03 | |
| 1992 | 0.03 | |
| 1993 | 0.04 | |
| 1994 | 0.05 | |
| 1995 | 0.08 | |
| 1996 | 0.11 | |
| 1997 | 0.13 | |
| 1998 | 0.15 | |
| 1999 | 0.17 | |
| 2000 | 0.2 | |
| 2001 | 0.26 | |
| 2002 | 0.3 | |
| 2003 | 0.37 | |
| 2004 | 0.4 | |
| 2005 | 0.45 | |
| 2006 | 0.48 | |
| 2007 | 0.52 | |
| 2008 | 0.58 | |
| 2009 | 0.7 |
