| 年度 | 实际值 |
|---|---|
| 1993 | 1559 |
| 1994 | 1649 |
| 1995 | 1932 |
| 1996 | 1894 |
| 1997 | 6134 |
| 1998 | 6301 |
| 1999 | 4970 |
| 2000 | 6795 |
| 2001 | 7174 |
| 2002 | 6573 |
| 2003 | 6362 |
| 2004 | 6566 |
| 2005 | 7196 |
| 2006 | 7423 |
| 2007 | 7154 |
| 2008 | 17434 |
| 2009 | |
| 2010 | 10063 |
| 2011 | 9334 |
| 2012 | 10986 |
| 2013 | 12584 |
| 2014 | 12870 |
| 2015 | 13671 |
| 2016 | 13954 |
| 2017 | 14756 |
| 2018 | 15046 |