| 年度 | 实际值 |
|---|---|
| 1978 | 414 |
| 1979 | |
| 1980 | 975 |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 1111 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 2233 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 16768 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 31969 |
| 2000 | 43796 |
| 2001 | 30846 |
| 2002 | 32826 |
| 2003 | 36757 |
| 2004 | 117375 |
| 2005 | 52637 |
| 2006 | 32571 |
| 2007 | 53228 |
| 2008 | 72983 |
| 2009 | 68424 |
| 2010 | 131472 |