| 年度 | 实际值 |
|---|---|
| 1992 | 144.7 |
| 1993 | |
| 1994 | |
| 1995 | 145.2 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 146.2 |
| 2000 | 145.7 |
| 2001 | 145 |
| 2002 | 144.6 |
| 2003 | 144 |
| 2004 | 143 |
| 2005 | 142 |
| 2006 | 142 |
| 2007 | 141.01 |
| 2008 | 140.92 |
| 2009 | 140.72 |
| 2010 | 141.21 |
| 2011 | 142.26 |
| 2012 | 142.5 |
| 2013 | 143.22 |
| 2014 | 143.69 |
| 2015 | 143.63 |
| 2016 | 143.7 |
| 2017 | 142.6 |
| 2018 | 141.97 |