| 年度 | 实际值 |
|---|---|
| 1992 | 27.4 |
| 1993 | 27.57 |
| 1994 | 28.65 |
| 1995 | 29.33 |
| 1996 | 30.2 |
| 1997 | |
| 1998 | 135.01 |
| 1999 | 135.45 |
| 2000 | 134.48 |
| 2001 | 135.68 |
| 2002 | 136.33 |
| 2003 | 137.07 |
| 2004 | 137.52 |
| 2005 | 137.88 |
| 2006 | 139.53 |
| 2007 | 141.82 |
| 2008 | 143.56 |
| 2009 | |
| 2010 | 145.75 |
| 2011 | 149.1 |
| 2012 | 149 |
| 2013 | 149.5 |
| 2014 | 151.2 |
| 2015 | 153.3 |
| 2016 | 155 |
| 2017 | 156 |
| 2018 | 157 |