| 年度 | 实际值 |
|---|---|
| 1993 | 1152 |
| 1994 | 1750 |
| 1995 | 1781 |
| 1996 | 1801 |
| 1997 | 2112 |
| 1998 | 2691 |
| 1999 | 2908 |
| 2000 | 2097 |
| 2001 | 2160 |
| 2002 | 1885 |
| 2003 | 1759 |
| 2004 | 1768 |
| 2005 | 1782 |
| 2006 | 1906 |
| 2007 | 1927 |
| 2008 | 2120 |
| 2009 | |
| 2010 | 2162 |
| 2011 | 1722 |
| 2012 | 2391 |
| 2013 | 4593 |
| 2014 | 3073 |
| 2015 | 3148 |
| 2016 | 3370 |
| 2017 | 3564 |
| 2018 | 3846 |