Year	Number
1960	231625
1961	235892
1962	239414
1963	242089
1964	243818
1965	244652
1966	244865
1967	245532
1968	247200
1969	248500
1970	249183
1971	250304
1972	251488
1973	252080
1974	252430
1975	252430
1976	251873
1977	251400
1978	251287
1979	251474
1980	252507
1981	254263
1982	256573
1983	259878
1984	263635
1985	266994
1986	270483
1987	274697
1988	278997
1989	281422
1990	281509
1991	280194
1992	275605
1993	268591
1994	261525
1995	253999
1996	245952
1997	237154
1998	227379
1999	217346
2000	207473
2001	197076
2002	186994
2003	178474
2004	170908
2005	164083
2006	158684
2007	154829
2008	152158
2009	149652
2010	146943
2011	145130
2012	144750
2013	145045
2014	145274
2015	145354
2016	145519
2017	145733
2018	145489
2019	144993
2020	144011
2021	142270
2022	141068
2023	140001