| 年度 | 实际值 |
|---|---|
| 1992 | 118 |
| 1993 | |
| 1994 | |
| 1995 | 117.6 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 117.6 |
| 2000 | 117.3 |
| 2001 | 117 |
| 2002 | 116.4 |
| 2003 | 116 |
| 2004 | 116 |
| 2005 | 116 |
| 2006 | 115 |
| 2007 | 115.23 |
| 2008 | 114.6 |
| 2009 | 113.771 |
| 2010 | 113.3647 |
| 2011 | 113.4 |
| 2012 | 113.59 |
| 2013 | 113.58 |
| 2014 | 113.73 |
| 2015 | 112.65 |
| 2016 | 112.5 |
| 2017 | 110.6 |
| 2018 | 109.81 |