| 年度 | 实际值 |
|---|---|
| 1992 | 440 |
| 1993 | 443 |
| 1994 | 443 |
| 1995 | 447 |
| 1996 | 449 |
| 1997 | 451 |
| 1998 | 452 |
| 1999 | 453 |
| 2000 | 454 |
| 2001 | 455 |
| 2002 | 456 |
| 2003 | 455.54 |
| 2004 | 456.94 |
| 2005 | 458.22 |
| 2006 | 438.45 |
| 2007 | 440.61 |
| 2008 | 442.66 |
| 2009 | |
| 2010 | 437.48 |
| 2011 | 437.88 |
| 2012 | 437.42 |
| 2013 | 438.56 |
| 2014 | 439.45 |
| 2015 | 439.88 |