Year	Number
1970	215400
1971	211600
1972	232500
1973	230600
1974	239100
1975	246300
1976	255700
1977	256300
1978	258000
1979	262400
1980	248400
1981	254400
1982	268600
1983	241000
1984	259900
1985	261200
1986	274400
1987	314400
1988	368200
1989	393200
1990	441700
1991	408000
1992	413700
1993	459800
1994	479000
1995	482000
1996	549900
1997	667500
1998	691800
1999	748600
2000	811776
2001	777756
2002	734679
2003	695865
2004	682263
2005	728081
2006	805731
2007	825471
2008	827851
2009	771675
2010	738003.426442238
2011	754292
2012	739353.599757151
2013	641440
2014	610197
2015	607168
2016	599427
2017	599256
2018	597412
2019	598374
2020	268744
2021	332174