Year	Number
1960	36245
1961	36416
1962	36701
1963	37050
1964	37417
1965	37753
1966	38074
1967	38407
1968	38728
1969	38991
1970	39212
1971	39460
1972	39834
1973	40332
1974	40896
1975	41505
1976	41974
1977	42241
1978	42498
1979	42822
1980	43195
1981	43701
1982	44369
1983	45051
1984	45694
1985	46293
1986	46875
1987	47489
1988	48099
1989	48665
1990	49174
1991	49458
1992	49496
1993	49490
1994	49483
1995	49503
1996	49584
1997	49740
1998	49938
1999	50158
2000	50381
2001	50614
2002	50921
2003	51287
2004	51699
2005	52163
2006	52682
2007	53218
2008	53697
2009	54128
2010	54527
2011	54665
2012	54654
2013	54837
2014	55036
2015	55316
2016	55690
2017	56049
2018	56720
2019	57553
2020	58230
2021	58791
2022	59208
2023	59484