Year	Number
1960	40150
1961	42002
1962	43864
1963	45811
1964	47842
1965	49940
1966	52096
1967	54310
1968	56581
1969	58904
1970	61270
1971	63642
1972	65993
1973	68338
1974	70713
1975	73128
1976	75564
1977	78038
1978	80584
1979	83210
1980	85907
1981	88715
1982	91810
1983	95170
1984	98663
1985	102294
1986	106052
1987	109907
1988	113822
1989	117775
1990	121736
1991	125638
1992	129412
1993	133094
1994	136742
1995	140362
1996	143959
1997	147512
1998	151018
1999	154516
2000	158010
2001	161470
2002	164895
2003	168286
2004	171603
2005	174832
2006	177979
2007	181055
2008	184074
2009	187059
2010	190046
2011	192834
2012	195401
2013	197935
2014	200411
2015	202801
2016	205084
2017	207238
2018	209257
2019	211173
2020	213048
2021	214922
2022	216797
2023	218629