| 年度 | 实际值 |
|---|---|
| 1994 | 8892 |
| 1995 | 10985 |
| 1996 | 12633 |
| 1997 | 12424 |
| 1998 | 12866 |
| 1999 | 11785 |
| 2000 | 12155 |
| 2001 | 11234 |
| 2002 | 11895 |
| 2003 | 13139 |
| 2004 | 15403 |
| 2005 | 13616 |
| 2006 | 13654 |
| 2007 | 13926 |
| 2008 | 17099 |
| 2009 | 20865 |
| 2010 | 27000 |
| 2011 | 31482 |
| 2012 | 33587 |
| 2013 | 35863 |
| 2014 | 37337 |
| 2015 | 33781 |
| 2016 | 36622 |
| 2017 | 38097 |
| 2018 | 36664 |