| 年度 | 实际值 |
|---|---|
| 1978 | 1983 |
| 1979 | |
| 1980 | 2033 |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 5130 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 13230 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 26664 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 28564 |
| 2000 | 19284 |
| 2001 | 9889 |
| 2002 | 749 |
| 2003 | 6657 |
| 2004 | 12990 |
| 2005 | 7965 |
| 2006 | 20086 |
| 2007 | 19084 |
| 2008 | 29747 |
| 2009 | 48380 |
| 2010 | 147161 |