| 年度 | 实际值 |
|---|---|
| 1992 | 51900 |
| 1993 | |
| 1994 | |
| 1995 | 46450 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 44946 |
| 2000 | 39640 |
| 2001 | 31120 |
| 2002 | 26090 |
| 2003 | 21490 |
| 2004 | 22800 |
| 2005 | 23450 |
| 2006 | 23660 |
| 2007 | 24040 |
| 2008 | 25900 |
| 2009 | 25980 |
| 2010 | 24660 |
| 2011 | 23280 |
| 2012 | 23140 |
| 2013 | 22820 |
| 2014 | 18620 |
| 2015 | 18020 |
| 2016 | 17840 |