| 年度 | 实际值 |
|---|---|
| 1993 | 1581 |
| 1994 | 1827 |
| 1995 | 1778 |
| 1996 | 4275 |
| 1997 | 4275 |
| 1998 | 5798 |
| 1999 | 4640 |
| 2000 | 3712 |
| 2001 | 3953 |
| 2002 | 2449 |
| 2003 | 2633 |
| 2004 | 2367 |
| 2005 | 2424 |
| 2006 | 2745 |
| 2007 | 2521 |
| 2008 | 2240 |
| 2009 | |
| 2010 | 2569 |
| 2011 | 2851 |
| 2012 | 3954 |
| 2013 | 3808 |
| 2014 | 4267 |
| 2015 | 4505 |
| 2016 | 3799 |
| 2017 | 5106 |
| 2018 | 5670 |