Year	Number
1960	928433
1961	924131
1962	918792
1963	916412
1964	917666
1965	921511
1966	927009
1967	932974
1968	938422
1969	944552
1970	949058
1971	951772
1972	955055
1973	956848
1974	956113
1975	953546
1976	948262
1977	940256
1978	930598
1979	919051
1980	905794
1981	891819
1982	877684
1983	862369
1984	845581
1985	830817
1986	818336
1987	807911
1988	802456
1989	801112
1990	803352
1991	809857
1992	819359
1993	830175
1994	840148
1995	849287
1996	858766
1997	868302
1998	877683
1999	888583
2000	898598
2001	904386
2002	908336
2003	910454
2004	909947
2005	908088
2006	906397
2007	906681
2008	909827
2009	914998
2010	919741
2011	922668
2012	925504
2013	929035
2014	931602
2015	932960
2016	935558
2017	938340
2018	936962
2019	932555
2020	925870
2021	917593
2022	911740
2023	907085