Year	Annual Number
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	1555000
1980	7
1981	0
1982	0
1983	0
1984	0
1985	0
1986	2012
1987	3
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	2841
1996	25020
1997	0
1998	975900
1999	0
2000	0
2001	3
2002	0
2003	10010
2004	14270
2005	1009
2006	0
2007	143100
2008	17020