| 年度 | 实际值 |
|---|---|
| 1992 | 2538 |
| 1993 | 557 |
| 1994 | 558 |
| 1995 | 564 |
| 1996 | 565 |
| 1997 | 567 |
| 1998 | 567 |
| 1999 | 568 |
| 2000 | 568 |
| 2001 | 569 |
| 2002 | 573 |
| 2003 | 575.15 |
| 2004 | 580.79 |
| 2005 | 584.13 |
| 2006 | 588.16 |
| 2007 | 594.69 |
| 2008 | 600.6 |
| 2009 | |
| 2010 | 602.39 |
| 2011 | 605.99 |
| 2012 | 608.83 |
| 2013 | 608.28 |
| 2014 | 608.34 |
| 2015 | 594.69 |