| 年度 | 实际值 |
|---|---|
| 1995 | 45.9 |
| 1996 | 42.8 |
| 1997 | 41.93 |
| 1998 | 42.8 |
| 1999 | 46.6 |
| 2000 | 52.4 |
| 2001 | 56.15 |
| 2002 | 56.15 |
| 2003 | 55.99 |
| 2004 | 53.97 |
| 2005 | 57.75 |
| 2006 | 59.43 |
| 2007 | 59.44 |
| 2008 | 59.61 |
| 2009 | |
| 2010 | 62.35 |
| 2011 | 61.39 |
| 2012 | 62.33 |
| 2013 | 62.15 |
| 2014 | 64.09 |
| 2015 | 65.66 |
| 2016 | 67.33 |
| 2017 | |
| 2018 | 72.13 |