| 年度 | 实际值 |
|---|---|
| 1982 | 7696 |
| 1983 | 7805 |
| 1984 | 9005 |
| 1985 | 9510 |
| 1986 | 8287 |
| 1987 | 8455 |
| 1988 | 8963 |
| 1989 | 9505 |
| 1990 | 9761 |
| 1991 | 8759 |
| 1992 | 7236 |
| 1993 | 5193 |
| 1994 | 4482 |
| 1995 | 5680 |
| 1996 | 6362 |
| 1997 | 7839 |
| 1998 | 8770 |
| 1999 | 9506 |
| 2000 | 10621 |
| 2001 | 2946 |
| 2002 | 1981 |
| 2003 | 2813 |
| 2004 | 2754 |
| 2005 | 2795 |
| 2006 | 2921 |
| 2007 | 2910 |
| 2008 | 2753 |
| 2009 | 2814 |
| 2010 | 2050 |
| 2011 | 1760 |
| 2012 | 1550 |
| 2013 | 1380 |
| 2014 | 1242 |
| 2015 | 1430 |