Year	Number
1960	68273
1961	71181
1962	72797
1963	74499
1964	76294
1965	78184
1966	80179
1967	82280
1968	84422
1969	85652
1970	85432
1971	84367
1972	82863
1973	81150
1974	79378
1975	77642
1976	75906
1977	74884
1978	74995
1979	76094
1980	78741
1981	83042
1982	88591
1983	94797
1984	103919
1985	113287
1986	122643
1987	131967
1988	141474
1989	151364
1990	161755
1991	172714
1992	184320
1993	196608
1994	209684
1995	227066
1996	245770
1997	265803
1998	287259
1999	310156
2000	336269
2001	365619
2002	396461
2003	428852
2004	463031
2005	499293
2006	538099
2007	579725
2008	624295
2009	671695
2010	721729
2011	772460
2012	823609
2013	865086
2014	907703
2015	951178
2016	995169
2017	1039364
2018	1083654
2019	1127920
2020	1166712
2021	1202330
2022	1239599
2023	1276538