Year	Number
1960	25854
1961	26406
1962	26896
1963	27380
1964	27869
1965	28400
1966	28937
1967	29505
1968	30144
1969	30804
1970	31526
1971	32297
1972	33110
1973	33955
1974	34914
1975	35983
1976	37060
1977	38037
1978	38885
1979	39690
1980	40459
1981	41189
1982	41799
1983	42262
1984	42627
1985	42894
1986	43084
1987	43321
1988	43568
1989	43732
1990	43864
1991	44038
1992	44394
1993	44902
1994	45412
1995	45881
1996	46313
1997	46718
1998	47105
1999	47476
2000	47839
2001	48121
2002	48398
2003	48724
2004	49037
2005	49391
2006	49927
2007	50583
2008	51234
2009	51906
2010	52585
2011	53274
2012	54017
2013	54805
2014	55562
2015	56284
2016	57016
2017	57747
2018	58461
2019	59217
2020	60215
2021	61463
2022	62550
2023	63468