| 年度 | 实际值 |
|---|---|
| 1992 | 30398 |
| 1993 | |
| 1994 | |
| 1995 | 36682 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 19011 |
| 2000 | 14993 |
| 2001 | 11310 |
| 2002 | 11310 |
| 2003 | 25609 |
| 2004 | 29119 |
| 2005 | 17373 |
| 2006 | 19792 |
| 2007 | 22611 |
| 2008 | 16544 |
| 2009 | 19004 |
| 2010 | 26241 |
| 2011 | 30911.3 |
| 2012 | 33297 |
| 2013 | 39010 |
| 2014 | 53273 |
| 2015 | 15674.4 |
| 2016 | 43961 |