Year	Number
1960	38105
1961	38019
1962	37949
1963	37957
1964	38118
1965	38434
1966	38916
1967	39574
1968	40345
1969	41121
1970	41863
1971	42566
1972	43199
1973	43793
1974	44419
1975	45022
1976	45599
1977	46205
1978	46753
1979	47057
1980	47101
1981	46910
1982	46423
1983	45784
1984	45208
1985	44806
1986	44581
1987	44579
1988	44912
1989	45779
1990	47382
1991	49751
1992	52682
1993	55936
1994	59232
1995	62226
1996	64684
1997	66659
1998	68475
1999	70343
2000	72412
2001	74791
2002	77392
2003	79983
2004	82362
2005	84277
2006	85465
2007	85752
2008	85176
2009	84216
2010	83542
2011	83680
2012	84821
2013	86894
2014	89624
2015	93002
2016	97173
2017	101901
2018	106954
2019	112477
2020	118531
2021	125385
2022	133318
2023	142066