| 年度 | 实际值 |
|---|---|
| 1993 | 2271 |
| 1994 | 2374 |
| 1995 | 1971 |
| 1996 | 2010 |
| 1997 | 2428 |
| 1998 | 1764 |
| 1999 | 3073 |
| 2000 | 2039 |
| 2001 | 1556 |
| 2002 | 2065 |
| 2003 | 1653 |
| 2004 | 1723 |
| 2005 | 3248 |
| 2006 | 2611 |
| 2007 | 4880 |
| 2008 | 5798 |
| 2009 | |
| 2010 | 3051 |
| 2011 | 3679 |
| 2012 | 2371 |
| 2013 | 2538 |
| 2014 | 2579 |
| 2015 | 4615 |
| 2016 | 3592 |
| 2017 | 5827 |
| 2018 | 5867 |