Year	Number
1960	57573
1961	59840
1962	62049
1963	64124
1964	66039
1965	67888
1966	69664
1967	71066
1968	72090
1969	72983
1970	73764
1971	74420
1972	74965
1973	75431
1974	75971
1975	76549
1976	76943
1977	77031
1978	76914
1979	76753
1980	76561
1981	76270
1982	75419
1983	74048
1984	72611
1985	71225
1986	70093
1987	69591
1988	69470
1989	69244
1990	68940
1991	68792
1992	68965
1993	69388
1994	70012
1995	70782
1996	71659
1997	72608
1998	73601
1999	74606
2000	75592
2001	76480
2002	76928
2003	76947
2004	76832
2005	76571
2006	76153
2007	75863
2008	75818
2009	75834
2010	75965
2011	76269
2012	76666
2013	77105
2014	77596
2015	78129
2016	78741
2017	79412
2018	80056
2019	80688
2020	81512
2021	82516
2022	83549
2023	84527