Year	Number
1970	441800
1971	432200
1972	435200
1973	446300
1974	429400
1975	397100
1976	409300
1977	413300
1978	462600
1979	476900
1980	477500
1981	434000
1982	433200
1983	435600
1984	457900
1985	471700
1986	498900
1987	522900
1988	573300
1989	639100
1990	670700
1991	615500
1992	654600
1993	659400
1994	684900
1995	724800
1996	772300
1997	788900
1998	801900
1999	840800
2000	876158
2001	925638
2002	924944
2003	891154
2004	970036
2005	1018118
2006	1037032
2007	1044883
2008	1056206
2009	1003893
2010	985109.023067177
2011	1062692
2012	1050702.90909091
2013	1052640
2014	1064175.7
2015	1104117
2016	1180312
2017	1182696
2018	1242985
2019	1061464
2020	303493
2021	289731