Year	Annual Number
1970	88140
1971	0
1972	0
1973	0
1974	0
1975	0
1976	20020
1977	0
1978	0
1979	0
1980	48
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	155000
1988	0
1989	0
1990	6514
1991	0
1992	0
1993	0
1994	0
1995	893
1996	30730
1997	0
1998	2043
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0