Year	Number
1960	183406
1961	184475
1962	184707
1963	185233
1964	185806
1965	186708
1966	187796
1967	189308
1968	190648
1969	191844
1970	194528
1971	197577
1972	200914
1973	204839
1974	208735
1975	213271
1976	218212
1977	224407
1978	230625
1979	237269
1980	245733
1981	258296
1982	269523
1983	277398
1984	281862
1985	285089
1986	292496
1987	299936
1988	307584
1989	314565
1990	319770
1991	324532
1992	327760
1993	323472
1994	324589
1995	322154
1996	321715
1997	319316
1998	318033
1999	316184
2000	313322
2001	314462
2002	314141
2003	309570
2004	306331
2005	303282
2006	301782
2007	306577
2008	307917
2009	309569
2010	311739
2011	311492
2012	309464
2013	304420
2014	295955
2015	286587
2016	280290
2017	274208
2018	268717
2019	263880
2020	258861
2021	253063
2022	248869