| 年度 | 实际值 |
|---|---|
| 1993 | 708 |
| 1994 | 717 |
| 1995 | 603 |
| 1996 | 689 |
| 1997 | 591 |
| 1998 | 610 |
| 1999 | 988 |
| 2000 | 989 |
| 2001 | 1174 |
| 2002 | 1726 |
| 2003 | 1615 |
| 2004 | 1644 |
| 2005 | 2054 |
| 2006 | 1795 |
| 2007 | 2090 |
| 2008 | 2509 |
| 2009 | |
| 2010 | 2358 |
| 2011 | 3062 |
| 2012 | 7159 |
| 2013 | 3834 |
| 2014 | 3915 |
| 2015 | 3843 |
| 2016 | 4087 |
| 2017 | 4193 |
| 2018 | 4580 |