| 年度 | 实际值 |
|---|---|
| 1985 | 3484 |
| 1986 | 3911 |
| 1987 | 5042 |
| 1988 | 6841 |
| 1989 | 6899 |
| 1990 | 8892 |
| 1991 | 9996 |
| 1992 | 9494 |
| 1993 | 10033 |
| 1994 | 10904 |
| 1995 | 14313 |
| 1996 | 14422 |
| 1997 | 14612 |
| 1998 | 13834 |
| 1999 | 11046 |
| 2000 | 10561 |
| 2001 | 29868 |
| 2002 | 17734 |
| 2003 | 17876 |
| 2004 | 21490 |
| 2005 | 20379 |
| 2006 | 20833 |
| 2007 | 24797 |
| 2008 | 28146 |
| 2009 | 28620 |
| 2010 | 30141 |
| 2011 | 33673 |
| 2012 | 34039 |
| 2013 | 35325 |
| 2014 | 34184 |
| 2015 | 36276 |