| 年度 | 实际值 |
|---|---|
| 1992 | 43.8 |
| 1993 | |
| 1994 | |
| 1995 | 44.7 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 45.1 |
| 2000 | 47.5058 |
| 2001 | 45.9442 |
| 2002 | 46.1002 |
| 2003 | 46.1155 |
| 2004 | 46.2899 |
| 2005 | 46.69 |
| 2006 | 46.69 |
| 2007 | 46.53 |
| 2008 | 46.58 |
| 2009 | 46.8833 |
| 2010 | 46.9203 |
| 2011 | 47.2825 |
| 2012 | 47.4548 |
| 2013 | 47.692 |
| 2014 | 46.36 |
| 2015 | 46.4818911699226 |
| 2016 | 47 |
| 2017 | 47 |