Year	Number
1960	35001
1961	35549
1962	35973
1963	36409
1964	36872
1965	37317
1966	37728
1967	38094
1968	38396
1969	38669
1970	38912
1971	39168
1972	39513
1973	39937
1974	40422
1975	40958
1976	41336
1977	41491
1978	41633
1979	41835
1980	42083
1981	42531
1982	43245
1983	44051
1984	44829
1985	45571
1986	46251
1987	46834
1988	47388
1989	47909
1990	48372
1991	48580
1992	48504
1993	48393
1994	48290
1995	48200
1996	48228
1997	48401
1998	48606
1999	48797
2000	48998
2001	49272
2002	49641
2003	50054
2004	50488
2005	50978
2006	51552
2007	52173
2008	52768
2009	53309
2010	53820
2011	54033
2012	54053
2013	54307
2014	54594
2015	54958
2016	55385
2017	55862
2018	56815
2019	57925
2020	58803
2021	59516
2022	60003
2023	60319