| 年度 | 实际值 |
|---|---|
| 1992 | 44.11 |
| 1993 | 44.56 |
| 1994 | 45.66 |
| 1995 | 46.43 |
| 1996 | 47.75 |
| 1997 | 48.9 |
| 1998 | 49.65 |
| 1999 | 50.3 |
| 2000 | 56.4 |
| 2001 | 52.48 |
| 2002 | 54.08 |
| 2003 | 62.2 |
| 2004 | 57.57 |
| 2005 | 59.17 |
| 2006 | 59.81 |
| 2007 | 60.3 |
| 2008 | 60.44 |
| 2009 | |
| 2010 | 63.8 |
| 2011 | 64.3 |
| 2012 | 65 |
| 2013 | 65.4 |
| 2014 | 66.2 |
| 2015 | 66.95 |
| 2016 | 66 |
| 2017 | 100 |
| 2018 | 100 |