Year	Number
1970	988900
1971	985200
1972	1025000
1973	1085000
1974	1130000
1975	1150000
1976	1370000
1977	1400000
1978	1500000
1979	1755000
1980	1787500
1981	1787000
1982	1675000
1983	1790000
1984	1950000
1985	2090000
1986	1965300
1987	2095000
1988	2163600
1989	1997700
1990	1907000
1991	645700
1992	814000
1993	915800
1994	789200
1995	862700
1996	718200
1997	721700
1998	827700
1999	734700
2000	535246
2001	233963
2002	62798
2003	310952
2004	476277
2005	653703
2006	808451
2007	855229
2008	1073496
2009	798165
2010	801840
2011	932868
2012	973062
2013	1013220
2014	1060147
2015	1063498
2016	1092333
2017	1133069
2018	1022645
2019	832828
2020	443067
2021	41126