Year	Number
1974	305900
1975	335000
1976	352000
1977	350600
1978	359600
1979	405400
1980	414800
1981	454700
1982	473200
1983	484100
1984	586000
1985	598800
1986	632200
1987	694300
1988	759600
1989	735000
1990	798300
1991	817600
1992	883800
1993	903900
1994	1033000
1995	1132000
1996	1297800
1997	1216800
1998	1240700
1999	1148500
2000	1214474
2001	1521532
2002	1613668
2003	1584801
2004	2066109
2005	2217764
2006	2452518
2007	2700805
2008	2796487
2009	3093117
2010	3844008.026672279
2011	4195951.463181262
2012	4536353.000819761
2013	4864727.317995496
2014	5436093.351510985
2015	5872686
2016	6431560
2017	6919854.67
2018	7387754.841489686
2019	7629985
2020	4901769.069
2021	4732700.188