| 年度 | 实际值 |
|---|---|
| 1978 | 576 |
| 1979 | |
| 1980 | 789 |
| 1981 | |
| 1982 | |
| 1983 | |
| 1984 | |
| 1985 | 2306 |
| 1986 | |
| 1987 | |
| 1988 | |
| 1989 | |
| 1990 | 4104 |
| 1991 | |
| 1992 | |
| 1993 | |
| 1994 | |
| 1995 | 14160 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 19261 |
| 2000 | 43171 |
| 2001 | 16194 |
| 2002 | 15020 |
| 2003 | 20461 |
| 2004 | 30200 |
| 2005 | 22190 |
| 2006 | 14604 |
| 2007 | 19948 |
| 2008 | 50491 |
| 2009 | 82764 |
| 2010 | 111947 |