| 年度 | 实际值 |
|---|---|
| 1993 | 4556 |
| 1994 | 4232 |
| 1995 | 4788 |
| 1996 | 4788 |
| 1997 | 4542 |
| 1998 | 3702 |
| 1999 | 3758 |
| 2000 | 5221 |
| 2001 | 5665 |
| 2002 | 4547 |
| 2003 | 5239 |
| 2004 | 4488 |
| 2005 | 3775 |
| 2006 | 3778 |
| 2007 | 4041 |
| 2008 | 4043 |
| 2009 | |
| 2010 | 5332 |
| 2011 | 7352 |
| 2012 | 7505 |
| 2013 | 7863 |
| 2014 | 7988 |
| 2015 | 5773 |
| 2016 | 5893 |
| 2017 | 8953 |
| 2018 | 9213 |