| 年度 | 实际值 |
|---|---|
| 1992 | 749 |
| 1993 | 751 |
| 1994 | 270 |
| 1995 | 755 |
| 1996 | 670 |
| 1997 | 672 |
| 1998 | 673 |
| 1999 | 674 |
| 2000 | 678.85 |
| 2001 | 680.31 |
| 2002 | 681.67 |
| 2003 | 683.77 |
| 2004 | 684.790473 |
| 2005 | 688 |
| 2006 | 691.347603255954 |
| 2007 | 692.261079288514 |
| 2008 | 693.074209120763 |
| 2009 | 691.576937296845 |
| 2010 | 696.556474456132 |
| 2011 | 697.976395836273 |
| 2012 | 677.75075886658 |
| 2013 | 643 |
| 2014 | 679 |
| 2015 | 680 |