Year	Number
1960	68099
1961	64717
1962	61690
1963	59271
1964	57243
1965	55885
1966	56777
1967	59410
1968	62347
1969	65570
1970	68997
1971	72653
1972	76523
1973	80660
1974	85184
1975	90035
1976	95388
1977	101261
1978	107406
1979	113631
1980	119774
1981	125885
1982	132121
1983	138495
1984	144719
1985	151316
1986	158585
1987	166208
1988	174062
1989	181886
1990	190054
1991	198973
1992	208237
1993	217810
1994	227757
1995	237429
1996	247039
1997	257326
1998	267995
1999	278397
2000	288323
2001	297646
2002	306479
2003	315239
2004	324318
2005	334796
2006	346560
2007	358784
2008	371513
2009	384751
2010	398610
2011	413944
2012	428844
2013	441823
2014	455263
2015	470061
2016	485980
2017	503171
2018	522033
2019	542685
2020	565126
2021	586786
2022	608176
2023	635324