| 年度 | 实际值 |
|---|---|
| 1995 | 5713 |
| 1996 | 1025 |
| 1997 | 1922 |
| 1998 | 3901 |
| 1999 | 2621 |
| 2000 | 4269 |
| 2001 | 4823 |
| 2002 | 5584 |
| 2003 | 5621 |
| 2004 | 9426 |
| 2005 | 4164 |
| 2006 | 6710 |
| 2007 | 2836 |
| 2008 | 10269 |
| 2009 | |
| 2010 | 21181 |
| 2011 | 58405 |
| 2012 | 73049 |
| 2013 | 37776 |
| 2014 | 37021 |
| 2015 | 35505 |
| 2016 | 18593 |
| 2017 | 11127 |
| 2018 | 28758 |