| 年度 | 实际值 |
|---|---|
| 1992 | 42.4 |
| 1993 | |
| 1994 | |
| 1995 | 43.1 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 42.69 |
| 2000 | 428050 |
| 2001 | 427136 |
| 2002 | 39.5775 |
| 2003 | 39.4238 |
| 2004 | 39.2108 |
| 2005 | 39.2237 |
| 2006 | 39.29 |
| 2007 | 39.61 |
| 2008 | 39.96 |
| 2009 | 41.2167 |
| 2010 | 41.38 |
| 2011 | 40.9213 |
| 2012 | 40.21 |
| 2013 | 40.59 |
| 2014 | 40.33 |
| 2015 | 34.77 |
| 2016 | 34.34 |