Year	Number
1970	7862000
1971	7996500
1972	7982800
1973	8109600
1974	7522800
1975	7372300
1976	7562100
1977	7898000
1978	8100600
1979	8387000
1980	8328300
1981	7901900
1982	7878500
1983	8142800
1984	8615800
1985	9092400
1986	9831200
1987	10310800
1988	10835900
1989	10937400
1990	11438000
1991	11229100
1992	11615900
1993	11684200
1994	12761400
1995	13485000
1996	14270600
1997	14686400
1998	14791900
1999	15678400
2000	16933507
2001	16714073
2002	15385330
2003	15869640
2004	17597666
2005	17822494
2006	17855201
2007	18271239
2008	17590453
2009	17494249
2010	19410119.832211003
2011	19559119.977765948
2012	19344793.670384027
2013	19289671.06386341
2014	19202136.98724954
2015	19396035
2016	19781310
2017	19856333.92
2018	20014360.90576359
2019	20337590.648128357
2020	10438219.906
2021	12898826.452