| 年度 | 实际值 |
|---|---|
| 1978 | 570 |
| 1979 | |
| 1980 | 1819 |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 2905 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 4083 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 10435 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 6376 |
| 2000 | 7506 |
| 2001 | 9319 |
| 2002 | 17179 |
| 2003 | 23583 |
| 2004 | 26231 |
| 2005 | 31203 |
| 2006 | 49132 |
| 2007 | 61587 |
| 2008 | 49898 |
| 2009 | 88756 |
| 2010 | 88770 |