| 年度 | 实际值 |
|---|---|
| 1992 | 496.46 |
| 1993 | 499.24 |
| 1994 | 503.14 |
| 1995 | 506.65 |
| 1996 | 509.63 |
| 1997 | 511.99 |
| 1998 | 517.27 |
| 1999 | 520.21 |
| 2000 | 518.36 |
| 2001 | 520.16 |
| 2002 | 521.75 |
| 2003 | 527.52 |
| 2004 | 529.07 |
| 2005 | 530.71 |
| 2006 | 533.3 |
| 2007 | 537.95 |
| 2008 | 540.71 |
| 2009 | |
| 2010 | 541.87 |
| 2011 | 543.4 |
| 2012 | 545.4 |
| 2013 | 547.4 |
| 2014 | |
| 2015 | 545.48 |
| 2016 | 545 |
| 2017 | 537 |
| 2018 | 536 |