| 年度 | 实际值 |
|---|---|
| 1992 | 234.15 |
| 1993 | 235.4 |
| 1994 | 236.62 |
| 1995 | 238.08 |
| 1996 | 239.22 |
| 1997 | 239.49 |
| 1998 | 240.35 |
| 1999 | 240.53 |
| 2000 | 240.97 |
| 2001 | 241.01 |
| 2002 | 241.3 |
| 2003 | 241.22 |
| 2004 | 240.97 |
| 2005 | 242.39 |
| 2006 | 242.52 |
| 2007 | 242.8 |
| 2008 | 242.7 |
| 2009 | |
| 2010 | 241.36 |
| 2011 | 241.1 |
| 2012 | 240.5 |
| 2013 | 239.7 |
| 2014 | |
| 2015 | 238.15 |
| 2016 | 238 |
| 2017 | 235 |
| 2018 | 234 |