Year	Number
1970	1152015.875
1971	1185301.25
1972	1254635.75
1973	1319120.25
1974	1356051.5
1975	1394332.375
1976	1408590.875
1977	1441808.375
1978	1474747.625
1979	1525498.375
1980	1585867.125
1981	1641148.5
1982	1709794.375
1983	1821823.625
1984	1902758.375
1985	1952721.5
1986	2010502.125
1987	2024025.625
1988	2043556.25
1989	2068814.875
1990	2197002
1991	2343043.25
1992	2489766.25
1993	2606828
1994	2660081.75
1995	2678500.75
1996	2712183.5
1997	2761606.25
1998	2741467.25
1999	2688791
2000	2813026.5
2001	2880545.25
2002	3112948.5
2003	3298409.75
2004	3418247.75
2005	3798122.75
2006	4078368.75
2007	4442092
2008	4836836
2009	5080187
2010	5364656
2011	5511013.5
2012	5359552.5
2013	5085252.5
2014	5343114
2015	5423966
2016	6022939
2017	6193940
2018	6874406
2019	7646302.5
2020	8155747
2021	8212593
2022	8261408