| 年度 | 实际值 |
|---|---|
| 1992 | 614 |
| 1993 | |
| 1994 | |
| 1995 | 463 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 1588 |
| 2000 | 1556 |
| 2001 | 7740 |
| 2002 | 9065 |
| 2003 | 10882 |
| 2004 | 10020 |
| 2005 | 10868 |
| 2006 | 10983 |
| 2007 | 12600 |
| 2008 | 10403 |
| 2009 | 8437 |
| 2010 | 9711 |
| 2011 | 12229 |
| 2012 | 18636 |
| 2013 | 20904 |
| 2014 | 29937 |
| 2015 | 34856 |
| 2016 | 58509 |
| 2017 | 70584 |