Year	Number
1961	4314
1962	5591
1963	6698
1964	7274
1965	7675
1966	7424
1967	7204
1968	8115
1969	8756
1970	9031
1971	9606
1972	10374
1973	11574
1974	12864
1975	15303
1976	18567
1977	20672
1978	23329
1979	25340
1980	27544
1981	31387
1982	35533
1983	37216
1984	37920
1985	43959
1986	47573
1987	52400
1988	54900
1989	58919
1990	62557
1991	65594
1992	69352
1993	72782
1994	78150
1995	86141
1996	86652
1997	87442
1998	93327
1999	95649
2000	97660
2001	100347
2002	103636
2003	103626
2004	104583
2005	106131
2006	107946
2007	108425
2008	109890