| 年度 | 实际值 |
|---|---|
| 1992 | 14.1 |
| 1993 | |
| 1994 | |
| 1995 | 13.8 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 13.89 |
| 2000 | 139326 |
| 2001 | 139099 |
| 2002 | 9.944 |
| 2003 | 10.5208 |
| 2004 | 10.4919 |
| 2005 | 10.4222 |
| 2006 | 10.4 |
| 2007 | 10.45 |
| 2008 | 10.51 |
| 2009 | 10.565 |
| 2010 | 10.6984 |
| 2011 | 10.6946 |
| 2012 | 10.75 |
| 2013 | 10.91 |
| 2014 | 11.04 |
| 2015 | 11.15 |
| 2016 | 10.33 |