Year	Number
1975	810434
1976	791984
1977	781704
1978	769193
1979	763565
1980	757432
1981	751200
1982	766286
1983	757117
1984	747041
1985	773488
1986	804916
1987	838015
1988	865426
1989	899875
1990	894377
1991	1074902
1992	1061342
1993	1018400
1994	957960
1995	888667
1996	827661
1997	786131
1998	771779
1999	586546
2000	489951
2001	410864
2002	326917
2003	281655
2004	279257
2005	265376
2006	248405
2007	230717
2008	227008
2009	229955
2010	160616
2011	129962
2012	138223
2013	114056
2014	128317
2016	126778
2017	104478
2018	63762
2019	32337