| 年度 | 实际值 |
|---|---|
| 1992 | 154 |
| 1993 | 155 |
| 1994 | 155 |
| 1995 | 157 |
| 1996 | 157 |
| 1997 | 158 |
| 1998 | 158 |
| 1999 | 159 |
| 2000 | 159 |
| 2001 | 159 |
| 2002 | 159 |
| 2003 | 159.14 |
| 2004 | 158.21 |
| 2005 | 158.35 |
| 2006 | 158.72 |
| 2007 | 159.54 |
| 2008 | 161.61 |
| 2009 | |
| 2010 | 160.01 |
| 2011 | 159.74 |
| 2012 | 158.81 |
| 2013 | 157.73 |
| 2014 | 154.32 |
| 2015 | 153.73 |