Year	Number
1960	174848
1961	178386
1962	183336
1963	188765
1964	194320
1965	200030
1966	205920
1967	212019
1968	218344
1969	224894
1970	231076
1971	235098
1972	236647
1973	237411
1974	238235
1975	239181
1976	240049
1977	240677
1978	241207
1979	241713
1980	242627
1981	241242
1982	239730
1983	237859
1984	235529
1985	232814
1986	227615
1987	221942
1988	215818
1989	209503
1990	203718
1991	204833
1992	206355
1993	208011
1994	209527
1995	210759
1996	211750
1997	212584
1998	213187
1999	213550
2000	213385
2001	212985
2002	212263
2003	211254
2004	209980
2005	208520
2006	206892
2007	205108
2008	203144
2009	201016
2010	198994
2011	198759
2012	198485
2013	198066
2014	197625
2015	197123
2016	196644
2017	196259
2018	195740
2019	195065
2020	194299
2021	193416
2022	192507
2023	191686