Year	Total
1971	11950
1972	19430
1973	14450
1974	23820
1975	32930
1976	29580
1977	19090
1978	14360
1979	62770
1980	116300
1981	148800
1982	148600
1983	83920
1984	32070
1985	116800
1986	102800
1987	90460
1988	106700
1989	137100
1990	113700
1991	107800
1992	90110
1993	94500
1994	100900
1995	153400
1996	153200
1997	161600
1998	118400
1999	150800
2000	151700
2001	154800
2002	148700
2003	157500
2004	150300
2005	123600
2006	129800
2007	154500
2008	163200
2009	183200
2010	139100