| 年度 | 实际值 |
|---|---|
| 1978 | 1091 |
| 1979 | |
| 1980 | 1327 |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 3682 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 4720 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 43835 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 27132 |
| 2000 | 84668 |
| 2001 | 80722 |
| 2002 | 78570 |
| 2003 | 36832 |
| 2004 | 37991 |
| 2005 | 261011 |
| 2006 | 369622 |
| 2007 | 50286 |
| 2008 | 127532 |
| 2009 | 137394 |
| 2010 | 193994 |