| 年度 | 实际值 |
|---|---|
| 1978 | 1004 |
| 1979 | |
| 1980 | 799 |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 1235 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 1595 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 16111 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 9699 |
| 2000 | 9656 |
| 2001 | 10534 |
| 2002 | 10593 |
| 2003 | 19605 |
| 2004 | 39236 |
| 2005 | 44560 |
| 2006 | 63349 |
| 2007 | 50808 |
| 2008 | 78052 |
| 2009 | 111360 |
| 2010 | 162326 |