Year	Total
1960	0
1961	0
1962	0
1963	0
1964	0
1965	1548
1966	3869
1967	4299
1968	1978
1969	5245
1970	4815
1971	7739
1972	126000
1973	181500
1974	176600
1975	1029000
1976	1375000
1977	1712000
1978	2045000
1979	1809000
1980	2278000
1981	3240000
1982	3357000
1983	3526000
1984	4379000
1985	5035000
1986	6015000
1987	5794000
1988	5969000
1989	5641000
1990	5863000
1991	6600000
1992	5464000
1993	5279000
1994	6290000
1995	6013000
1996	6386000
1997	6013000
1998	6327000
1999	6293000
2000	4928000
2001	6200000
2002	5856000
2003	5797000
2004	6663000
2005	6223000
2006	5759000
2007	5758000
2008	5493000
2009	4486000
2010	4972000
2011	5164000