Year	Total
1971	28370
1972	42560
1973	64660
1974	42730
1975	28200
1976	33450
1977	23130
1978	21500
1979	25020
1980	22100
1981	31470
1982	41190
1983	20210
1984	38870
1985	55550
1986	21500
1987	42910
1988	15740
1989	19430
1990	11610
1991	25190
1992	17110
1993	30350
1994	14270
1995	16600
1996	11610
1997	6449
1998	18490
1999	17450
2000	4643
2001	5933
2002	4901
2003	22790
2004	21580
2005	47720
2006	18740
2007	19430
2008	24330
2009	26310
2010	14960