| 年度 | 实际值 |
|---|---|
| 1992 | 69.5 |
| 1993 | |
| 1994 | |
| 1995 | 72.5 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 76.2 |
| 2000 | 77.2 |
| 2001 | 77.2941 |
| 2002 | 77.7074 |
| 2003 | 75.8061 |
| 2004 | 76.4476 |
| 2005 | 77.1658 |
| 2006 | 77.9831 |
| 2007 | 79.314 |
| 2008 | 80.3453 |
| 2009 | 81.373 |
| 2010 | 85 |
| 2011 | 85 |
| 2012 | 84 |
| 2013 | 85 |
| 2014 | 86 |
| 2015 | 88 |
| 2016 | 90 |
| 2017 | 90 |