| 年度 | 实际值 |
|---|---|
| 1992 | 67 |
| 1993 | |
| 1994 | |
| 1995 | 67.9 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 68.7 |
| 2000 | 68.9306 |
| 2001 | 72.07 |
| 2002 | 69.3557 |
| 2003 | 69.6116 |
| 2004 | 70.1244 |
| 2005 | 72.3 |
| 2006 | 72.19 |
| 2007 | 71.99 |
| 2008 | 72.06 |
| 2009 | 71.6382 |
| 2010 | 71.834 |
| 2011 | 72.296 |
| 2012 | 72.6413 |
| 2013 | 73.2027 |
| 2014 | 69.9 |
| 2015 | 70.11 |
| 2016 | 73 |
| 2017 | 73 |