| 年度 | 实际值 |
|---|---|
| 1992 | 5446 |
| 1993 | |
| 1994 | |
| 1995 | 8728 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 13313 |
| 2000 | 11275 |
| 2001 | 12001 |
| 2002 | 14835 |
| 2003 | 23325 |
| 2004 | 40914 |
| 2005 | 34237 |
| 2006 | 17180 |
| 2007 | 19402 |
| 2008 | 16587 |
| 2009 | 20435 |
| 2010 | 26119 |
| 2011 | 32506 |
| 2012 | 33703 |
| 2013 | 34404 |
| 2014 | 46702 |
| 2015 | 47390 |
| 2016 | 53792 |
| 2017 | 61851 |