| 年度 | 实际值 |
|---|---|
| 1992 | 36.66 |
| 1993 | 37.26 |
| 1994 | 37.5 |
| 1995 | 38.33 |
| 1996 | 38.88 |
| 1997 | |
| 1998 | |
| 1999 | 39.7886 |
| 2000 | 40.3752 |
| 2001 | 40.7313 |
| 2002 | 40.9455 |
| 2003 | 42.0827 |
| 2004 | 44.0438 |
| 2005 | 44.9308 |
| 2006 | 45.2466 |
| 2007 | 46.4736 |
| 2008 | 47.7248 |
| 2009 | |
| 2010 | 51.53 |
| 2011 | 49.4 |
| 2012 | 50.4 |
| 2013 | 60.1 |
| 2014 | |
| 2015 | 53.03 |
| 2016 | 54 |
| 2017 | 54 |
| 2018 | 55 |