| 年度 | 实际值 |
|---|---|
| 1995 | 47.4 |
| 1996 | 47.6 |
| 1997 | 48.25 |
| 1998 | 50.3 |
| 1999 | 49.8 |
| 2000 | 52.6 |
| 2001 | 54.49 |
| 2002 | 55.68 |
| 2003 | 53.73 |
| 2004 | 53.03 |
| 2005 | 57.79 |
| 2006 | 57.6 |
| 2007 | 58.41 |
| 2008 | 59.02 |
| 2009 | |
| 2010 | 61.01 |
| 2011 | 61.51 |
| 2012 | 63.59 |
| 2013 | 64.62 |
| 2014 | 65.23 |
| 2015 | 67.11 |
| 2016 | 69.35 |
| 2017 | |
| 2018 | 71.75 |