| 年度 | 实际值 |
|---|---|
| 1993 | 3166 |
| 1994 | 3654 |
| 1995 | 3718 |
| 1996 | 4012 |
| 1997 | 2495 |
| 1998 | 2591 |
| 1999 | 3567 |
| 2000 | 2999 |
| 2001 | 3404 |
| 2002 | 6028 |
| 2003 | 4979 |
| 2004 | 4899 |
| 2005 | 5003 |
| 2006 | 4617 |
| 2007 | 5601 |
| 2008 | 5910 |
| 2009 | |
| 2010 | 5192 |
| 2011 | 6006 |
| 2012 | 6930 |
| 2013 | 5600 |
| 2014 | 8211 |
| 2015 | 6787 |
| 2016 | 6798 |
| 2017 | 5131 |
| 2018 | 5184 |