Year	Number
1960	179979
1961	188346
1962	197113
1963	206289
1964	215906
1965	225943
1966	236461
1967	247468
1968	259005
1969	271045
1970	283663
1971	296868
1972	310707
1973	325150
1974	340287
1975	356128
1976	372729
1977	390056
1978	408214
1979	427217
1980	444958
1981	449653
1982	454405
1983	459206
1984	464065
1985	468961
1986	473917
1987	478924
1988	483992
1989	489099
1990	494267
1991	499489
1992	504774
1993	510101
1994	515491
1995	520937
1996	526450
1997	532004
1998	537626
1999	543307
2000	548271
2001	548056
2002	547842
2003	547627
2004	547412
2005	547198
2006	546984
2007	546769
2008	546555
2009	546341
2010	546127
2011	545913
2012	545699
2013	545485
2014	545272
2015	545058
2016	544844
2017	544631
2018	544417
2019	544259
2020	544207
2021	544305
2022	544579
2023	545045