| 年度 | 实际值 |
|---|---|
| 1993 | 28479 |
| 1994 | 28741 |
| 1995 | 28715 |
| 1996 | 28147 |
| 1997 | 27424 |
| 1998 | 26338 |
| 1999 | 24929 |
| 2000 | 24549 |
| 2001 | 25889 |
| 2002 | 20843 |
| 2003 | 19868 |
| 2004 | 22111 |
| 2005 | 19624 |
| 2006 | 22094 |
| 2007 | 24836 |
| 2008 | 22897 |
| 2009 | |
| 2010 | 24161 |
| 2011 | 26649 |
| 2012 | 27476 |
| 2013 | 28766 |
| 2014 | 33340 |
| 2015 | 35871 |
| 2016 | 36088 |
| 2017 | 41127 |
| 2018 | 43020 |