Year	Number
1970	65800
1971	108500
1972	130000
1973	211300
1974	228200
1975	239000
1976	296900
1977	346700
1978	392700
1979	402500
1980	480000
1981	485500
1982	634000
1983	631000
1984	676500
1985	718000
1986	536100
1987	561000
1988	582000
1989	403400
1990	284200
1991	356600
1992	363100
1993	274800
1994	295000
1995	345000
1996	361800
1997	279000
1998	277900
1999	292600
2000	273000
2001	324114
2002	243122
2003	315100
2004	355610
2005	384059
2006	424794
2007	453051
2008	470598
2009	466050
2010	0
2011	171007.2
2012	248027.2
2013	287208
2014	275760
2015	267208
2016	343592
2017	236000
2018	265136
2019	83882
2020	40884
2021	177992