Year	Annual Number
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	90050
1977	0
1978	0
1979	0
1980	0
1981	0
1982	38500
1983	34520
1984	36
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	7154
1992	14
1993	0
1994	100500
1995	0
1996	3250
1997	5
1998	156800
1999	92030
2000	0
2001	274
2002	102100
2003	1002
2004	1042
2005	507
2006	936
2007	0
2008	0