Year	Number
1960	355792
1961	371550
1962	384179
1963	392353
1964	396249
1965	395504
1966	392349
1967	388810
1968	384981
1969	380916
1970	376579
1971	372244
1972	368090
1973	363843
1974	359679
1975	355781
1976	352518
1977	350330
1978	349640
1979	350714
1980	353415
1981	357327
1982	362415
1983	369092
1984	377340
1985	385542
1986	392796
1987	399048
1988	403167
1989	404182
1990	402528
1991	399427
1992	395306
1993	390004
1994	382969
1995	374017
1996	365108
1997	354933
1998	344756
1999	332674
2000	321803
2001	312640
2002	302963
2003	293414
2004	284571
2005	276187
2006	268851
2007	262963
2008	258489
2009	255778
2010	253699
2011	251558
2012	249940
2013	249191
2014	251337
2015	254414
2016	256773
2017	257095
2018	256411
2019	255188
2020	254337
2021	252221
2022	240477
2023	232189