Year	Number
1960	95585
1961	95285
1962	94804
1963	94141
1964	93543
1965	92959
1966	91981
1967	90646
1968	89252
1969	88081
1970	86916
1971	85893
1972	84820
1973	83663
1974	82666
1975	81492
1976	79841
1977	77959
1978	76112
1979	74338
1980	72677
1981	71423
1982	71274
1983	71088
1984	70956
1985	70888
1986	71000
1987	71258
1988	71568
1989	72060
1990	72754
1991	73027
1992	72443
1993	72114
1994	70584
1995	69903
1996	71143
1997	72233
1998	72653
1999	71252
2000	68866
2001	66922
2002	65592
2003	64389
2004	63322
2005	62340
2006	61400
2007	60436
2008	59615
2009	58848
2010	58061
2011	57505
2012	57082
2013	56651
2014	56277
2015	55941
2016	55524
2017	55298
2018	54831
2019	54417
2020	53882
2021	53305
2022	53025
2023	52967