Year	Number
1961	39501
1962	43556
1963	46064
1964	48650
1965	51701
1966	54472
1967	58314
1968	62957
1969	67724
1970	72228
1971	71663
1972	75926
1973	75042
1974	77598
1975	82382
1976	87124
1977	91112
1978	89435
1979	92551
1980	96923
1981	100343
1982	104943
1983	106867
1984	109229
1985	115367
1986	119749
1987	125303
1988	124256
1989	129963
1990	133981
1991	136083
1992	203189
1993	209859
1994	218469
1995	221419
1996	215695
1997	223486
1998	235793