Year	Number
1975	415857
1976	442594
1977	475805
1978	517640
1979	569294
1980	614723
1981	705481.1
1982	767261
1983	841069
1984	910815
1985	976388
1986	1067283
1987	1149258
1988	1233264
1989	1319855.5
1990	1427559
1991	1531659
1992	1662559
1993	1804719
1994	1942995
1995	2077669
1996	2243129
1997	2419132
1998	2570036
1999	2700152
2000	2827010
2001	2907125
2002	2903605
2003	2975718
2004	2990260.5
2005	3169130
2006	3155511
2007	3276714
2008	3364755
2009	3389312
2010	3374819
2011	3398274
2012	3243515
2013	3102513
2014	3077559
2015	3049214
2016	2980257
2017	2984966
2018	2771576
2019	2908708
2020	2914157
2021	2861566
2022	2489269