| 年度 | 实际值 |
|---|---|
| 1992 | 64.6 |
| 1993 | |
| 1994 | |
| 1995 | 67.8 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 73.7 |
| 2000 | 74.9 |
| 2001 | 75.4862 |
| 2002 | 78.5593 |
| 2003 | 80.1607 |
| 2004 | 80.102 |
| 2005 | 82.0527 |
| 2006 | 79.2823 |
| 2007 | 78.0914 |
| 2008 | 81.5597 |
| 2009 | 78.9355 |
| 2010 | 81 |
| 2011 | 82 |
| 2012 | 83 |
| 2013 | 84 |
| 2014 | 85 |
| 2015 | 85 |
| 2016 | 86 |
| 2017 | 86 |