Year Observed Predicted
1983 0 1
1984 0 1
1985 1 0
1986 0 0
1987 0 0
1988 0 1
1989 2 1
1990 0 1
1991 4 3
1992 1 2
1993 1 0
1994 21 15
1995 8 9
1996 2 3
1997 21 16
1998 6 1
1999 8 12
2000 5 1
2001 11 10
2002 10 18
2003 19 27
2004 6 16
2005 9 15
2006 67 47
2007 14 10
2008 13 21
2009 15 16
2010 36 32