Year	Annual Number
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	2010
1979	0
1980	0
1981	20010
1982	130100
1983	1250000
1984	575100
1985	0
1986	64530
1987	0
1988	0
1989	501300
1990	440000
1991	297200
1992	656000
1993	330000
1994	728200
1995	120000
1996	10000
1997	5010
1998	364500
1999	375000
2000	400000
2001	160
2002	500000
2003	695200
2004	200000
2005	145000
2006	333000
2007	406000
2008	738100