| 年度 | 实际值 |
|---|---|
| 1993 | 2331 |
| 1994 | 2244 |
| 1995 | 2267 |
| 1996 | 4777 |
| 1997 | 4263 |
| 1998 | 4531 |
| 1999 | 6695 |
| 2000 | 5868 |
| 2001 | 2448 |
| 2002 | 1979 |
| 2003 | 2533 |
| 2004 | 5924 |
| 2005 | 3565 |
| 2006 | 3605 |
| 2007 | 3764 |
| 2008 | 3390 |
| 2009 | |
| 2010 | 3578 |
| 2011 | 4131 |
| 2012 | 8497 |
| 2013 | 8522 |
| 2014 | 7396 |
| 2015 | 7611 |
| 2016 | 8231 |
| 2017 | 9317 |
| 2018 | 9619 |