Year	Number
1970	1422563.625
1971	1424681.125
1972	1469106.375
1973	1537979.75
1974	1609788.5
1975	1679165
1976	1740820.625
1977	1780544
1978	1833124.5
1979	1876314.625
1980	1944479
1981	2022470.625
1982	2082592.125
1983	2140400
1984	2203627.25
1985	2274947.5
1986	2342899.25
1987	2420819.25
1988	2486820.75
1989	2540642
1990	2567359.5
1991	2657981
1992	2692567.75
1993	2724649.75
1994	2817237
1995	2893813.75
1996	2944449.25
1997	2997723.25
1998	3089240.75
1999	3127621.75
2000	3214828
2001	3280855.25
2002	3321563.25
2003	3351416.25
2004	3367212.5
2005	3378474.75
2006	3415904
2007	3431299
2008	3441990.25
2009	3462473.25
2010	3503817
2011	3551505.25
2012	3549765.5
2013	3581245
2014	3635107.25
2015	3697132
2016	3759306.25
2017	3831926.25
2018	3906498.75
2019	3986271.25
2020	4055822.75
2021	4106911.25
2022	4155265.25