Year	Number
1960	66379
1961	68542
1962	70923
1963	73376
1964	75800
1965	78180
1966	80515
1967	82961
1968	85523
1969	88218
1970	91017
1971	93891
1972	96846
1973	99889
1974	103023
1975	106253
1976	109590
1977	113038
1978	116602
1979	120230
1980	123875
1981	127533
1982	131211
1983	134978
1984	138862
1985	142829
1986	146886
1987	151040
1988	155261
1989	159548
1990	163460
1991	165867
1992	159371
1993	152070
1994	152386
1995	154584
1996	158046
1997	161550
1998	165604
1999	171722
2000	179678
2001	188157
2002	197079
2003	206352
2004	215949
2005	224207
2006	229926
2007	234729
2008	239652
2009	244515
2010	249266
2011	253914
2012	258388
2013	262635
2014	266719
2015	270703
2016	274622
2017	278925
2018	283599
2019	288171
2020	292553
2021	296668
2022	300521
2023	304184