| 年度 | 实际值 |
|---|---|
| 1992 | 194.47 |
| 1993 | 183.25 |
| 1994 | 227.92 |
| 1995 | 230.78 |
| 1996 | 233.9 |
| 1997 | 234.88 |
| 1998 | 236.5 |
| 1999 | 237.85 |
| 2000 | 239.34 |
| 2001 | 240.68 |
| 2002 | 243.62 |
| 2003 | 244.73 |
| 2004 | 247.31 |
| 2005 | 245.03 |
| 2006 | 248.19 |
| 2007 | 250.53 |
| 2008 | 251.64 |
| 2009 | |
| 2010 | 253.78 |
| 2011 | 250.5 |
| 2012 | 239.3 |
| 2013 | 242.1 |
| 2014 | |
| 2015 | 237.55 |
| 2016 | 238 |
| 2017 | 235 |
| 2018 | 233 |