| 年度 | 实际值 |
|---|---|
| 1992 | 64.63 |
| 1993 | 65.85 |
| 1994 | 66.65 |
| 1995 | 67.32 |
| 1996 | 67.51 |
| 1997 | |
| 1998 | |
| 1999 | |
| 2000 | |
| 2001 | 74.98 |
| 2002 | 75.72 |
| 2003 | 75.61 |
| 2004 | 76.73 |
| 2005 | 77.06 |
| 2006 | 78.8 |
| 2007 | 80.27 |
| 2008 | 80.54 |
| 2009 | |
| 2010 | 81.69 |
| 2011 | 84.6 |
| 2012 | 85.3 |
| 2013 | 85.8 |
| 2014 | 87.2 |
| 2015 | 89.14 |
| 2016 | 91 |
| 2017 | 93 |
| 2018 | 94 |