Year	Number
1970	1129827.125
1971	1177006.5
1972	1245786.625
1973	1301388.375
1974	1356452.875
1975	1418899.875
1976	1486030.125
1977	1579198.375
1978	1742213.625
1979	1866597.25
1980	1907415.625
1981	2006111.75
1982	2100743.5
1983	2222056.25
1984	2299359.5
1985	2317199.5
1986	2342627
1987	2353611
1988	2417740.25
1989	2493909
1990	2513912
1991	2632119
1992	2745989.75
1993	2867396.75
1994	2932715
1995	3013095.25
1996	3108587.25
1997	3217897.25
1998	3328502.25
1999	3404776.75
2000	3476768
2001	3595940.25
2002	3732604.25
2003	3953164
2004	4106985.5
2005	4242917.5
2006	4333785.5
2007	4411302
2008	4564318
2009	4761405
2010	4980267.5
2011	5251810.5
2012	5243681.5
2013	5598686.5
2014	5871945
2015	6097388
2016	6357145.5
2017	6621208
2018	6885212.5
2019	6858229.5
2020	6907336
2021	7079492
2022	7166602.5