年 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 |
雄 | 24 | 8 | 9 | 11 | 13 | 15 | 8 | 5 | 4 | 8 | 1 | 6 | 1 | 17 | 5 | 9 |
雌 | 18 | 6 | 10 | 12 | 14 | 11 | 5 | 8 | 4 | 7 | 4 | 5 | 2 | 9 | 2 | 4 |
合計 | 42 | 14 | 19 | 23 | 27 | 26 | 13 | 13 | 8 | 15 | 5 | 11 | 3 | 26 | 7 | 13 |
年 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 |
雄 | 14 | 9 | 5 | 1 | 1 | 7 | 3 | 5 | 10 | 12 | 3 | 4 | 2 | 6 |
雌 | 8 | 8 | 6 | 2 | 3 | 4 | 5 | 6 | 7 | 11 | 11 | 7 | 1 | 6 |
合計 | 22 | 17 | 11 | 3 | 4 | 11 | 8 | 11 | 17 | 23 | 14 | 11 | 3 | 12 |