Year	Number
1970	2468784.5
1971	2482227.5
1972	2544343
1973	2560076
1974	2649324.25
1975	2723346.75
1976	2796515.5
1977	2868025.25
1978	2897825.25
1979	2955250.5
1980	2999382.75
1981	3029946.25
1982	3044250.5
1983	3043000.25
1984	3039008
1985	3058785.5
1986	3088396.75
1987	3105985.25
1988	3120187.25
1989	3127857.25
1990	3191062.75
1991	3245463
1992	3275384.5
1993	3403750.5
1994	3452531
1995	3358909.75
1996	3324055.5
1997	3306314.5
1998	3233290.25
1999	3242430.25
2000	3318700
2001	3361519.5
2002	3373273.75
2003	3343778.25
2004	3331779.75
2005	3400262.75
2006	3361812
2007	3360513.25
2008	3330596.5
2009	3294553.75
2010	3282629.25
2011	3279832.5
2012	3231863
2013	3183818.25
2014	3147006.5
2015	3147857
2016	3196101.25
2017	3207017
2018	3195708.75
2019	3237338.25
2020	3329331
2021	3380608.75
2022	3406148.25