| 年度 | 实际值 |
|---|---|
| 1992 | 66840 |
| 1993 | |
| 1994 | |
| 1995 | 59600 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 60173 |
| 2000 | 45300 |
| 2001 | 34220 |
| 2002 | 27510 |
| 2003 | 24110 |
| 2004 | 25060 |
| 2005 | 27660 |
| 2006 | 28660 |
| 2007 | 28100 |
| 2008 | 28580 |
| 2009 | 28950 |
| 2010 | 28600 |
| 2011 | 28660 |
| 2012 | 28670 |
| 2013 | 28670 |
| 2014 | 26250 |
| 2015 | 26280 |
| 2016 | 26210 |