Year	Number
1972	5562018
1973	5215507
1974	5178865
1975	5098544
1976	4751852
1977	4435691
1978	4314884
1979	3971349
1980	2748819
1981	2646559
1982	2311449
1983	2511375
1984	2567737
1985	2539395
1986	2152192
1987	1786102
1988	1572778
1989	1533313
1990	1385116
1991	1375207
1992	1479655
1993	1645092
1994	1812213
1995	1758026
1996	1863824
1997	1936946
1998	1261816
1999	893455
2000	916117
2001	872186
2002	1010352
2003	998421
2004	973443
2005	691909
2006	712197
2007	516320
2008	488525
2009	817342
2010	805409
2011	1077055
2012	922702
2013	838555
2014	841489
2015	705430
2016	564486
2017	589714
2018	785319