| 年度 | 实际值 |
|---|---|
| 1992 | 47.53 |
| 1993 | 48.54 |
| 1994 | 49.21 |
| 1995 | 50.36 |
| 1996 | 51.61 |
| 1997 | 52.77 |
| 1998 | 53.94 |
| 1999 | 54.32 |
| 2000 | 55.06 |
| 2001 | 55.65 |
| 2002 | 56.28 |
| 2003 | 56.6 |
| 2004 | 57.19 |
| 2005 | 57.7 |
| 2006 | 58.55 |
| 2007 | 59.44 |
| 2008 | 60.1 |
| 2009 | |
| 2010 | 60.62 |
| 2011 | 65.1 |
| 2012 | 63.9 |
| 2013 | 64.1 |
| 2014 | 64.3 |
| 2015 | 64.5 |
| 2016 | 103 |
| 2017 | 102 |
| 2018 | 103 |