| 年度 | 实际值 |
|---|---|
| 1992 | 712 |
| 1993 | 714 |
| 1994 | 714 |
| 1995 | 717 |
| 1996 | 718 |
| 1997 | 715 |
| 1998 | 684 |
| 1999 | 683 |
| 2000 | 683 |
| 2001 | 681 |
| 2002 | 679 |
| 2003 | 674.44 |
| 2004 | 672.99 |
| 2005 | 671.74 |
| 2006 | 670.69 |
| 2007 | 671.46 |
| 2008 | 672.01 |
| 2009 | |
| 2010 | 672.01 |
| 2011 | 673.54 |
| 2012 | 667.9 |
| 2013 | 668.8 |
| 2014 | 670.03 |
| 2015 | 666.67 |