Year	Number
1970	171500
1971	188000
1972	216800
1973	340800
1974	382800
1975	361500
1976	449600
1977	237300
1978	363300
1979	377400
1980	392500
1981	408700
1982	391300
1983	435500
1984	479200
1985	558700
1986	611300
1987	655800
1988	720900
1989	760500
1990	794400
1991	759900
1992	721400
1993	769500
1994	753500
1995	740400
1996	778600
1997	835700
1998	1138400
1999	1357800
2000	1554949
2001	1418183
2002	1599843
2003	1678160
2004	2005473
2005	2424382
2006	2685148
2007	2857464
2008	2880546
2009	2948920
2010	4039583
2011	4508698.01161552
2012	4653459.73514364
2013	4516500
2014	4448530.52817802
2015	4569473
2016	4848016
2017	5109576
2018	5905365.1234425
2019	6417534.056
2020	1865768
2021	2459106