| 年度 | 实际值 |
|---|---|
| 1978 | 437 |
| 1979 | |
| 1980 | 713 |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 1010 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 5935 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 3569 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 8020 |
| 2000 | 3970 |
| 2001 | 5148 |
| 2002 | 9669 |
| 2003 | 10208 |
| 2004 | 2928 |
| 2005 | 2137 |
| 2006 | 6633 |
| 2007 | 32753 |
| 2008 | 45786 |
| 2009 | 66632 |
| 2010 | 158463 |