Year	Number
1960	24526
1961	24546
1962	24553
1963	24573
1964	24606
1965	24659
1966	24748
1967	24877
1968	25047
1969	25278
1970	25693
1971	26264
1972	26851
1973	27456
1974	28059
1975	28673
1976	29312
1977	29958
1978	30615
1979	31284
1980	31998
1981	32790
1982	33614
1983	34403
1984	35145
1985	35862
1986	36577
1987	37286
1988	37978
1989	38664
1990	39446
1991	40354
1992	41442
1993	42635
1994	43747
1995	44773
1996	45729
1997	46639
1998	47516
1999	48363
2000	49174
2001	50044
2002	51030
2003	52031
2004	52985
2005	53890
2006	54756
2007	55591
2008	56389
2009	57155
2010	58088
2011	59137
2012	60039
2013	60827
2014	61589
2015	62350
2016	63052
2017	63647
2018	64151
2019	64612
2020	65022
2021	65328
2022	65531
2023	65714