Year	Number
1960	317450
1961	330972
1962	344498
1963	357596
1964	370123
1965	381384
1966	391366
1967	401013
1968	411118
1969	420920
1970	428547
1971	434805
1972	440685
1973	445205
1974	448694
1975	451754
1976	454109
1977	456240
1978	457692
1979	458874
1980	460670
1981	462889
1982	466382
1983	470653
1984	475605
1985	481149
1986	486818
1987	493504
1988	500518
1989	512431
1990	520439
1991	516092
1992	511742
1993	507265
1994	502492
1995	497264
1996	490868
1997	482747
1998	472857
1999	461429
2000	448724
2001	433499
2002	419973
2003	405376
2004	389985
2005	373753
2006	356986
2007	339764
2008	323094
2009	307732
2010	294114
2011	282772
2012	273472
2013	265812
2014	258942
2015	252378
2016	247367
2017	242897
2018	237975
2019	233101
2020	228549
2021	224390
2022	220001
2023	215440