| 年度 | 实际值 |
|---|---|
| 1992 | 44 |
| 1993 | |
| 1994 | |
| 1995 | 44.6 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 44.7 |
| 2000 | 44.75 |
| 2001 | 44.77 |
| 2002 | 44.91 |
| 2003 | 44.71 |
| 2004 | 44.84 |
| 2005 | 45.23 |
| 2006 | 45.67 |
| 2007 | 45.25 |
| 2008 | 45.51 |
| 2009 | 45.71 |
| 2010 | 45.77 |
| 2011 | 45.97 |
| 2012 | 45.95 |
| 2013 | 46.18 |
| 2014 | 46.38 |
| 2015 | 46.41 |
| 2016 | 46.6126 |
| 2017 | 47 |