| 年度 | 实际值 |
|---|---|
| 1992 | 163 |
| 1993 | 164 |
| 1994 | 165 |
| 1995 | 167 |
| 1996 | 167 |
| 1997 | 168 |
| 1998 | 168 |
| 1999 | 169 |
| 2000 | 170 |
| 2001 | 170 |
| 2002 | 170 |
| 2003 | 170.82 |
| 2004 | 170.97 |
| 2005 | 171.96 |
| 2006 | 172.64 |
| 2007 | 172.68 |
| 2008 | 173.06 |
| 2009 | |
| 2010 | 172.22 |
| 2011 | 173.11 |
| 2012 | 172.61 |
| 2013 | 172.36 |
| 2014 | 172.93 |
| 2015 | 173.11 |