Year	Annual Number
1971	0
1972	0
1973	0
1975	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	30000
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	104
1995	0
1996	0
1997	102200
1998	0
1999	0
2000	0
2001	0
2002	3507
2003	0
2004	39
2005	200
2006	0
2007	0
2008	77000000