| 年度 | 实际值 |
|---|---|
| 1993 | 11000 |
| 1994 | 11400 |
| 1995 | 11800 |
| 1996 | 10000 |
| 1997 | 14800 |
| 1998 | 13000 |
| 1999 | |
| 2000 | 15306 |
| 2001 | 10612 |
| 2002 | 10461 |
| 2003 | 13423 |
| 2004 | 14769 |
| 2005 | 14417 |
| 2006 | 9581 |
| 2007 | 9672 |
| 2008 | 9775 |
| 2009 | 8625 |
| 2010 | 8098 |
| 2011 | 8194 |
| 2012 | 8129 |
| 2013 | 8107 |
| 2014 | 8255 |
| 2015 | 8497 |
| 2016 | 8715 |
| 2017 | 8720 |