Year	Total
1971	29150
1972	34480
1973	35080
1974	47030
1975	55800
1976	50130
1977	64400
1978	92260
1979	112500
1980	91140
1981	122100
1982	128400
1983	149600
1984	148200
1985	173300
1986	144500
1987	164300
1988	199700
1989	212300
1990	213000
1991	238200
1992	240400
1993	257400
1994	263800
1995	272000
1996	288400
1997	280200
1998	281500
1999	209400
2000	113900
2001	206600
2002	268200
2003	280300
2004	246700
2005	260200
2006	281900
2007	299900
2008	245000
2009	186600
2010	294700