| 年度 | 实际值 |
|---|---|
| 1992 | 223.25 |
| 1993 | 224.22 |
| 1994 | 225.09 |
| 1995 | 225.71 |
| 1996 | 226.81 |
| 1997 | 227.16 |
| 1998 | 227.13 |
| 1999 | 226.91 |
| 2000 | 227.01 |
| 2001 | 226.19 |
| 2002 | 226.11 |
| 2003 | 225.47 |
| 2004 | 224.88 |
| 2005 | 224.39 |
| 2006 | 223.9 |
| 2007 | 223.72 |
| 2008 | 223.19 |
| 2009 | |
| 2010 | 220.91 |
| 2011 | 220.1 |
| 2012 | 219.3 |
| 2013 | 218 |
| 2014 | |
| 2015 | 215.76 |
| 2016 | 215 |
| 2017 | 211 |
| 2018 | 209 |