| 年度 | 实际值 |
|---|---|
| 1993 | 1752 |
| 1994 | 2128 |
| 1995 | 1765 |
| 1996 | 1603 |
| 1997 | 1697 |
| 1998 | 1666 |
| 1999 | 1653 |
| 2000 | 1587 |
| 2001 | 1559 |
| 2002 | 1301 |
| 2003 | 1762 |
| 2004 | 1890 |
| 2005 | 1812 |
| 2006 | 1722 |
| 2007 | 1782 |
| 2008 | 1953 |
| 2009 | |
| 2010 | 1904 |
| 2011 | 3918 |
| 2012 | 2245 |
| 2013 | 2319 |
| 2014 | 2448 |
| 2015 | 2654 |
| 2016 | 2638 |
| 2017 | 2872 |
| 2018 | 3032 |