| 年度 | 实际值 |
|---|---|
| 1994 | 4467 |
| 1995 | 4601 |
| 1996 | 4560 |
| 1997 | 4304 |
| 1998 | 4495 |
| 1999 | 4467 |
| 2000 | 3911 |
| 2001 | 3990 |
| 2002 | 4128 |
| 2003 | 3356 |
| 2004 | 2979 |
| 2005 | 3055 |
| 2006 | 3367 |
| 2007 | 4662 |
| 2008 | 4537 |
| 2009 | |
| 2010 | 4614 |
| 2011 | 4885 |
| 2012 | 4880 |
| 2013 | 7524 |
| 2014 | 5017 |
| 2015 | 3274 |
| 2016 | 4458 |
| 2017 | 4780 |
| 2018 | 5250 |