Year	Number
1970	216500
1971	221500
1972	213900
1973	227500
1974	224300
1975	242800
1976	261600
1977	233100
1978	239900
1979	249000
1980	264900
1981	272400
1982	269100
1983	269100
1984	272500
1985	267000
1986	262200
1987	265400
1988	274800
1989	268100
1990	272700
1991	265700
1992	255800
1993	243600
1994	246900
1995	241900
1996	256800
1997	236100
1998	248900
1999	224800
2000	226175
2001	223542
2002	214168
2003	217640
2004	251709
2005	250009
2006	250482
2007	286183
2008	254859
2009	271231
2010	423255.5728528625
2011	482532.68656345614
2012	474712.1502561618
2013	537330.215238617
2014	592719.1510407926
2015	577707
2016	598997
2017	683401
2018	710450.7180198526
2019	664891.3
2020	354727.93539999996
2021	425094.0640000001