| 年度 | 实际值 |
|---|---|
| 1978 | 239 |
| 1979 | |
| 1980 | 278 |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 773 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 1226 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 4504 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 3934 |
| 2000 | 2753 |
| 2001 | 5471 |
| 2002 | 6922 |
| 2003 | 14524 |
| 2004 | 11629 |
| 2005 | 13575 |
| 2006 | 10330 |
| 2007 | 7447 |
| 2008 | 9989 |
| 2009 | 67062 |
| 2010 | 90295 |