Year	Number
1960	519510
1961	516918
1962	513552
1963	508777
1964	502497
1965	493888
1966	484443
1967	473997
1968	462719
1969	453316
1970	445510
1971	437715
1972	430002
1973	423350
1974	415590
1975	408125
1976	401946
1977	395206
1978	387071
1979	377807
1980	367241
1981	355571
1982	342839
1983	329823
1984	316311
1985	302768
1986	289175
1987	276120
1988	263021
1989	249907
1990	236612
1991	223327
1992	209577
1993	196664
1994	184743
1995	173472
1996	162440
1997	151703
1998	141726
1999	131630
2000	121556
2001	112077
2002	102811
2003	93719
2004	86275
2005	80278
2006	74346
2007	68676
2008	63764
2009	59852
2010	56794
2011	54228
2012	51836
2013	49715
2014	48493
2015	47791
2016	49387
2017	44817
2018	44455
2019	43247
2020	41286
2021	39730
2022	38575