Year	Number
1970	191083
1971	195859
1972	204218
1973	218167
1974	229527
1975	238267
1976	250715
1977	253987
1978	263171
1979	277854
1980	299823
1981	300536
1982	313790
1984	349889
1986	373759
1987	384367
1988	397463
1989	417818
1990	415195
1991	422348
1992	443552
1993	478040
1994	505153
1995	516797
1996	525962
1997	538730
1998	580623
2000	559817
2001	520846
2002	514735
2003	496616
2004	508333
2005	531759
2006	532250
2008	600557
2012	1132119
2016	1275085
2018	1394208