| 年度 | 实际值 |
|---|---|
| 1992 | 52.91 |
| 1993 | 54.4 |
| 1994 | 55.83 |
| 1995 | 62.8 |
| 1996 | 64.61 |
| 1997 | 66.42 |
| 1998 | 67.31 |
| 1999 | 67.6 |
| 2000 | 68.73 |
| 2001 | 69.97 |
| 2002 | 72.01 |
| 2003 | 73.97 |
| 2004 | 75.9 |
| 2005 | 77.63 |
| 2006 | 78.88 |
| 2007 | 80.6 |
| 2008 | 81.81 |
| 2009 | |
| 2010 | 82.63 |
| 2011 | 87.2 |
| 2012 | 87.4 |
| 2013 | 88 |
| 2014 | 89.6 |
| 2015 | 140.53 |
| 2016 | 146 |
| 2017 | 144 |
| 2018 | 146 |