| 年度 | 实际值 |
|---|---|
| 1993 | 3413 |
| 1994 | |
| 1995 | 4221 |
| 1996 | 3840 |
| 1997 | 3857 |
| 1998 | 3317 |
| 1999 | 3233 |
| 2000 | 3475 |
| 2001 | 2848 |
| 2002 | 2848 |
| 2003 | 2623 |
| 2004 | 2805 |
| 2005 | 3585 |
| 2006 | 3041 |
| 2007 | 2563 |
| 2008 | 2565 |
| 2009 | |
| 2010 | 4056 |
| 2011 | 4194 |
| 2012 | 3810 |
| 2013 | 3612 |
| 2014 | 3943 |
| 2015 | 3943 |
| 2016 | 4387 |
| 2017 | 4368 |
| 2018 | 4625 |
| 2019 | 4783 |