Year	Total
1971	6378
1972	6195
1973	6760
1974	7643
1975	8413
1976	7809
1977	8151
1978	8705
1979	9033
1980	9272
1981	9729
1982	10010
1983	11310
1984	12680
1985	14600
1986	18400
1987	21390
1988	21450
1989	21880
1990	22620
1991	22200
1992	20390
1993	20060
1994	19270
1995	21150
1996	22490
1997	23730
1998	27080
1999	30640
2000	34380
2001	34880
2002	34840
2003	37940
2004	38270
2005	42930
2006	43730
2007	42600
2008	44730
2009	44310
2010	44620