Year	Number
1960	50184
1961	50760
1962	51127
1963	51427
1964	51675
1965	51861
1966	51971
1967	51987
1968	51907
1969	51756
1970	51563
1971	51335
1972	51080
1973	50806
1974	50520
1975	50231
1976	49934
1977	49604
1978	49241
1979	48850
1980	48531
1981	48636
1982	49248
1983	50072
1984	50789
1985	51197
1986	51247
1987	50960
1988	50450
1989	49985
1990	49780
1991	50057
1992	50648
1993	51160
1994	51604
1995	51993
1996	52333
1997	52630
1998	52906
1999	53160
2000	53397
2001	53596
2002	53697
2003	53919
2004	54297
2005	54654
2006	55015
2007	55375
2008	55736
2009	56101
2010	56477
2011	56934
2012	57486
2013	58047
2014	58606
2015	59160
2016	59709
2017	60239
2018	60748
2019	61240
2020	61746
2021	62254
2022	62717
2023	63142