| 年度 | 实际值 |
|---|---|
| 1993 | 3858 |
| 1994 | 3676 |
| 1995 | 3768 |
| 1996 | 3464 |
| 1997 | 3517 |
| 1998 | 3517 |
| 1999 | 3694 |
| 2000 | 4043 |
| 2001 | 4147 |
| 2002 | 3500 |
| 2003 | 4029 |
| 2004 | 4125 |
| 2005 | 4148 |
| 2006 | 4133 |
| 2007 | 6200 |
| 2008 | 6242 |
| 2009 | |
| 2010 | 5764 |
| 2011 | 5354 |
| 2012 | 5637 |
| 2013 | 5830 |
| 2014 | 7682 |
| 2015 | 8133 |
| 2016 | 5532 |
| 2017 | 5730 |
| 2018 | 5875 |