| 年度 | 实际值 |
|---|---|
| 1992 | 41470 |
| 1993 | |
| 1994 | |
| 1995 | 38100 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 33791 |
| 2000 | 29840 |
| 2001 | 22940 |
| 2002 | 19390 |
| 2003 | 16630 |
| 2004 | 16780 |
| 2005 | 16480 |
| 2006 | 18000 |
| 2007 | 17570 |
| 2008 | 22430 |
| 2009 | 20650 |
| 2010 | 20140 |
| 2011 | 19870 |
| 2012 | 19540 |
| 2013 | 19270 |
| 2014 | 16710 |
| 2015 | 19710 |
| 2016 | 18410 |