Year	Number
1970	220000
1971	228000
1972	224700
1973	228200
1974	220100
1975	253200
1976	279800
1977	260600
1978	274000
1979	299000
1980	319400
1981	332600
1982	317200
1983	323100
1984	316800
1985	321700
1986	288600
1987	291800
1988	285800
1989	296600
1990	301300
1991	305600
1992	296300
1993	289100
1994	290100
1995	264900
1996	276400
1997	319700
1998	313400
1999	319300
2000	335069
2001	328777
2002	297804
2003	319863
2004	337379
2005	360846
2006	358736
2007	400752
2008	354861
2009	361975
2010	578696.6200196506
2011	624597.4444942056
2012	649833.2497254367
2013	689280.772
2014	665781.1268037994
2015	703831
2016	701537
2017	760811
2018	843583.211146022
2019	857966.0900000001
2020	370198.54639999993
2021	525625.861