表を表示
| 1980 | 1,422 | 1991 | 972 | 2002 | 1,305 |
| 1981 | 1,763 | 1992 | 984 | 2003 | 1,209 |
| 1982 | 1,785 | 1993 | 995 | 2004 | 1,361 |
| 1983 | 1,849 | 1994 | 1,061 | 2005 | 1,510 |
| 1984 | 1,840 | 1995 | 1,133 | 2006 | 1,726 |
| 1985 | 1,965 | 1996 | 1,186 | 2007 | 2,016 |
| 1986 | 2,284 | 1997 | 1,081 | 2008 | 2,557 |
| 1987 | 2,823 | 1998 | 1,028 | 2009 | 2,557 |
| 1988 | 1,390 | 1999 | 1,043 | 2010 | 2,807 |
| 1989 | 801 | 2000 | 1,203 | | |
| 1990 | 967 | 2001 | 1,237 | | |
表を表示
| 1980 | 5,616 | 1991 | 2.38万 | 2002 | 6.41万 |
| 1981 | 6,965 | 1992 | 2.76万 | 2003 | 5.98万 |
| 1982 | 7,049 | 1993 | 2.98万 | 2004 | 6.84万 |
| 1983 | 7,268 | 1994 | 3.55万 | 2005 | 7.88万 |
| 1984 | 7,231 | 1995 | 3.91万 | 2006 | 8.81万 |
| 1985 | 7,723 | 1996 | 4.61万 | 2007 | 10.1万 |
| 1986 | 8,976 | 1997 | 4.86万 | 2008 | 11.9万 |
| 1987 | 1.11万 | 1998 | 5.03万 | 2009 | 12万 |
| 1988 | 1.56万 | 1999 | 5.09万 | 2010 | 13.1万 |
| 1989 | 1.7万 | 2000 | 5.74万 | | |
| 1990 | 2.11万 | 2001 | 5.96万 | | |
表を表示
| 1980 | 5.09万 | 1991 | 5.01万 | 2002 | 5.96万 |
| 1981 | 5.33万 | 1992 | 5.52万 | 2003 | 5.67万 |
| 1982 | 5.29万 | 1993 | 5.76万 | 2004 | 5.88万 |
| 1983 | 5.2万 | 1994 | 5.92万 | 2005 | 6.05万 |
| 1984 | 4.71万 | 1995 | 6.08万 | 2006 | 6.2万 |
| 1985 | 4.89万 | 1996 | 6.11万 | 2007 | 6.39万 |
| 1986 | 4.5万 | 1997 | 5.9万 | 2008 | 6.52万 |
| 1987 | 4.41万 | 1998 | 6.09万 | 2009 | 6.74万 |
| 1988 | 4.81万 | 1999 | 5.75万 | 2010 | 6.87万 |
| 1989 | 4.37万 | 2000 | 5.74万 | | |
| 1990 | 4.66万 | 2001 | 5.79万 | | |