| 年度 | 实际值 |
|---|---|
| 1978 | 1908 |
| 1979 | |
| 1980 | |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 1838 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 2162 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 24121 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | |
| 2000 | 36726 |
| 2001 | |
| 2002 | 47698 |
| 2003 | 39687 |
| 2004 | 32860 |
| 2005 | 40154 |
| 2006 | 55738 |
| 2007 | 38215 |
| 2008 | 101353 |
| 2009 | 153990 |
| 2010 | 232457 |