| 年度 | 实际值 |
|---|---|
| 1992 | 47.92 |
| 1993 | 49.2 |
| 1994 | 50.63 |
| 1995 | 44.4 |
| 1996 | 44.72 |
| 1997 | |
| 1998 | |
| 1999 | 54.25 |
| 2000 | 0 |
| 2001 | 55.33 |
| 2002 | 55.56 |
| 2003 | 56.17 |
| 2004 | 56.01 |
| 2005 | 56.57 |
| 2006 | 57.57 |
| 2007 | 59.42 |
| 2008 | 59.52 |
| 2009 | |
| 2010 | 59.78 |
| 2011 | 60.8 |
| 2012 | 61.7 |
| 2013 | 62.4 |
| 2014 | 60.9 |
| 2015 | 61.49 |
| 2016 | 62 |
| 2017 | 62 |
| 2018 | 63 |