Year	Number
1978	3597439
1979	3568371.5
1980	3520765.25
1981	3510087.75
1982	3475699.75
1983	3487692
1984	3511504.75
1985	3604676
1986	3734868
1987	3864535.5
1988	3982343
1989	4088683.25
1990	4210156.5
1991	4304390.5
1992	4383412.5
1993	4481607
1994	4571197.5
1995	4686354
1996	4903833
1997	5084953.5
1998	5353825
1999	5589854
2000	5743358
2001	5753456
2002	6135876
2003	6379384.5
2004	6531122
2005	6643068
2006	6310182
2007	6488705
2008	6636923.5
2009	6698834
2010	6754537.5
2011	6798224.5
2012	6891769
2013	6744351.5
2014	6819200.5
2015	6905524
2016	7000929
2017	7113103.5
2018	7248795
2019	7399338.5
2020	7216558.5
2021	7882349.5
2022	8127961