| 年度 | 实际值 |
|---|---|
| 1992 | 43.8 |
| 1993 | |
| 1994 | |
| 1995 | 42.8 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 44.1 |
| 2000 | 44.9986 |
| 2001 | 45.0209 |
| 2002 | 45.0599 |
| 2003 | 45.1637 |
| 2004 | 45.1675 |
| 2005 | 45.28 |
| 2006 | 45.25 |
| 2007 | 45.48 |
| 2008 | 45.57 |
| 2009 | 45.2164 |
| 2010 | 45.3324 |
| 2011 | 45.6509 |
| 2012 | 45.72 |
| 2013 | 45.9621 |
| 2014 | 44.32 |
| 2015 | 44.45 |
| 2016 | 46 |
| 2017 | 46 |