| 年度 | 实际值 |
|---|---|
| 1992 | 520 |
| 1993 | 521 |
| 1994 | 521 |
| 1995 | 523 |
| 1996 | 525 |
| 1997 | 527 |
| 1998 | 528 |
| 1999 | 530 |
| 2000 | 530.98 |
| 2001 | 530.98 |
| 2002 | 531.01 |
| 2003 | 531.61 |
| 2004 | 532.790496 |
| 2005 | 471 |
| 2006 | 474.151543719067 |
| 2007 | 477.126640698696 |
| 2008 | 478.261253829837 |
| 2009 | 478.654195144945 |
| 2010 | 480.864188074476 |
| 2011 | 483.556740513787 |
| 2012 | 425.189247492183 |
| 2013 | 425 |
| 2014 | 427 |
| 2015 | 427 |