| 年度 | 实际值 |
|---|---|
| 1992 | 144 |
| 1993 | 145 |
| 1994 | 145 |
| 1995 | 149 |
| 1996 | 152 |
| 1997 | 151 |
| 1998 | 149 |
| 1999 | 149 |
| 2000 | 148 |
| 2001 | 148 |
| 2002 | 149 |
| 2003 | 148.88 |
| 2004 | 148.99 |
| 2005 | 148.94 |
| 2006 | 149.31 |
| 2007 | 149.33 |
| 2008 | 149.85 |
| 2009 | |
| 2010 | 144.87 |
| 2011 | 144.79 |
| 2012 | 143.89 |
| 2013 | 142.43 |
| 2014 | 142.32 |
| 2015 | 141.56 |