| 年度 | 实际值 |
|---|---|
| 1992 | 239.48 |
| 1993 | 169.73 |
| 1994 | 259.91 |
| 1995 | 259.26 |
| 1996 | 262.62 |
| 1997 | 264.6 |
| 1998 | 265.63 |
| 1999 | 267.55 |
| 2000 | 269.28 |
| 2001 | 271.22 |
| 2002 | 271 |
| 2003 | 270.02 |
| 2004 | 270.35 |
| 2005 | 266.3 |
| 2006 | 268.17 |
| 2007 | 269.83 |
| 2008 | 269.9 |
| 2009 | |
| 2010 | 270.23 |
| 2011 | 267.2 |
| 2012 | 259.6 |
| 2013 | 259 |
| 2014 | |
| 2015 | 262 |
| 2016 | 259 |
| 2017 | 255 |
| 2018 | 252 |
| 2019 | 250.4 |