Purchasing power parities (PPP) conversion factor, local currency unit to international dollar
| Year | Value | Footnotes |
|---|---|---|
| 1990 | 244.25 | |
| 1991 | 274.47 | |
| 1992 | 335.15 | |
| 1993 | 394.56 | |
| 1994 | 505.46 | |
| 1995 | 735.81 | |
| 1996 | 921.72 | |
| 1997 | 1056.92 | |
| 1998 | 1226.71 | |
| 1999 | 1441.38 | |
| 2000 | 1596.14 | |
| 2001 | 1727.28 | |
| 2002 | 1944.07 | |
| 2003 | 2213.96 | |
| 2004 | 2474.52 | |
| 2005 | 2714.82 | |
| 2006 | 2943.99 | |
| 2007 | 3355.03 | |
| 2008 | 4056.5 | |
| 2009 | 4620.57 |
