| 年度 | 实际值 |
|---|---|
| 1993 | 4111 |
| 1994 | 4162 |
| 1995 | 3768 |
| 1996 | 3902 |
| 1997 | 2471 |
| 1998 | 3506 |
| 1999 | 3622 |
| 2000 | 3666 |
| 2001 | 3104 |
| 2002 | 3302 |
| 2003 | 3608 |
| 2004 | 3415 |
| 2005 | 3471 |
| 2006 | 3492 |
| 2007 | 3781 |
| 2008 | 3699 |
| 2009 | |
| 2010 | 2995 |
| 2011 | 2946 |
| 2012 | 2891 |
| 2013 | 2969 |
| 2014 | 2640 |
| 2015 | 2640 |
| 2016 | 2751 |
| 2017 | 3966 |
| 2018 | 3898 |