| 年度 | 实际值 |
|---|---|
| 1993 | 2286 |
| 1994 | 2223 |
| 1995 | 2294 |
| 1996 | 1716 |
| 1997 | 1686 |
| 1998 | 1672 |
| 1999 | 1763 |
| 2000 | 1805 |
| 2001 | 1810 |
| 2002 | 1213 |
| 2003 | 1296 |
| 2004 | 5436 |
| 2005 | 995 |
| 2006 | 931 |
| 2007 | 1549 |
| 2008 | 1500 |
| 2009 | |
| 2010 | 3344 |
| 2011 | 2077 |
| 2012 | 2112 |
| 2013 | 2254 |
| 2014 | 2340 |
| 2015 | 2480 |
| 2016 | 2593 |
| 2017 | 1800 |
| 2018 | 2986 |