| 年度 | 实际值 |
|---|---|
| 1992 | 11.8 |
| 1993 | |
| 1994 | |
| 1995 | 13.2 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 13.88 |
| 2000 | 104450 |
| 2001 | 134795 |
| 2002 | 10.9047 |
| 2003 | 12.0291 |
| 2004 | 11.3268 |
| 2005 | 11.345 |
| 2006 | 13.71 |
| 2007 | 13.76 |
| 2008 | 13.82 |
| 2009 | 12.6069 |
| 2010 | 12.7665 |
| 2011 | 12.8956 |
| 2012 | 13.03 |
| 2013 | 13.25 |
| 2014 | 13.63 |
| 2015 | 13.15 |
| 2016 | 13.27 |