| 年度 | 实际值 |
|---|---|
| 1992 | 57.6 |
| 1993 | |
| 1994 | |
| 1995 | 61.2 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 64.6 |
| 2000 | 66.2 |
| 2001 | 66.8119 |
| 2002 | 67.3223 |
| 2003 | 68.0264 |
| 2004 | 67.5273 |
| 2005 | 68.3662 |
| 2006 | 69.5404 |
| 2007 | 70.5963 |
| 2008 | 71.4287 |
| 2009 | 72.4303 |
| 2010 | 73 |
| 2011 | 74 |
| 2012 | 73 |
| 2013 | 72 |
| 2014 | 76 |
| 2015 | 76 |
| 2016 | 77 |
| 2017 | 78 |