| 年度 | 实际值 |
|---|---|
| 1992 | 42.9 |
| 1993 | |
| 1994 | |
| 1995 | 43.5 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 44.8 |
| 2000 | 45.5314 |
| 2001 | 45.4291 |
| 2002 | 45.3071 |
| 2003 | 45.5639 |
| 2004 | 45.9672 |
| 2005 | 45.92 |
| 2006 | 45.89 |
| 2007 | 46.82 |
| 2008 | 46.92 |
| 2009 | 44.1433 |
| 2010 | 44.2852 |
| 2011 | 44.5914 |
| 2012 | 44.6179 |
| 2013 | 44.9938 |
| 2014 | 42.05 |
| 2015 | 42.1619442276444 |
| 2016 | 45 |
| 2017 | 45 |