| 年度 | 实际值 |
|---|---|
| 1992 | 58.7 |
| 1993 | |
| 1994 | |
| 1995 | 61 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 63.9 |
| 2000 | 65.5 |
| 2001 | 65.7977 |
| 2002 | 66.2102 |
| 2003 | 66.5617 |
| 2004 | 66.9431 |
| 2005 | 67.2332 |
| 2006 | 61.6305 |
| 2007 | 68.0394 |
| 2008 | 68.4377 |
| 2009 | 68.8051 |
| 2010 | 69 |
| 2011 | 70 |
| 2012 | 70 |
| 2013 | 71 |
| 2014 | 71 |
| 2015 | 72 |
| 2016 | 75 |
| 2017 | 75 |