| 年度 | 实际值 |
|---|---|
| 1992 | 39530 |
| 1993 | |
| 1994 | |
| 1995 | 34670 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 32504 |
| 2000 | 23900 |
| 2001 | 18710 |
| 2002 | 16050 |
| 2003 | 12120 |
| 2004 | 12670 |
| 2005 | 13070 |
| 2006 | 12800 |
| 2007 | 12830 |
| 2008 | 13760 |
| 2009 | 13140 |
| 2010 | 13110 |
| 2011 | 12680 |
| 2012 | 11460 |
| 2013 | 11710 |
| 2014 | 10520 |
| 2015 | 11310 |
| 2016 | 11830 |