| 年度 | 实际值 |
|---|---|
| 1992 | 36986 |
| 1993 | |
| 1994 | |
| 1995 | 33091 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 36340 |
| 2000 | 35900 |
| 2001 | 35967 |
| 2002 | 36049 |
| 2003 | 34430 |
| 2004 | 33640 |
| 2005 | 34804 |
| 2006 | 34771 |
| 2007 | 34558 |
| 2008 | 30396 |
| 2009 | 31014 |
| 2010 | 30123 |
| 2011 | 30706 |
| 2012 | 32472 |
| 2013 | 33010 |
| 2014 | 32914 |
| 2015 | 32954 |
| 2016 | 33450 |