Year	Number
1974	305900
1975	335000
1976	352000
1977	355500
1978	364500
1979	410900
1980	420500
1981	460300
1982	478800
1983	489500
1984	591400
1985	604300
1986	637600
1987	699800
1988	765400
1989	740800
1990	804100
1991	823400
1992	889900
1993	910000
1994	1039100
1995	1138400
1996	1304200
1997	1223700
1998	1241700
1999	1149800
2000	1215806
2001	1522837
2002	1615064
2003	1586155
2004	2067761
2005	2219532
2006	2454357
2007	2702754
2008	2798473
2009	3092984
2010	3844391.026672279
2011	4196284.463181262
2012	4537127.000819762
2013	4868207.317995496
2014	5435979.691759948
2015	5872462
2016	6431220
2017	6919472.67
2018	7387203.841489686
2019	7629160
2020	4901478.069
2021	4732454.516