Year	Number
1970	4585300
1971	5013400
1972	5360200
1973	6261300
1974	6811800
1975	7320600
1976	8568400
1977	8749000
1978	9727500
1979	11279300
1980	13004500
1981	14195700
1982	14213900
1983	14332400
1984	14673200
1985	14994600
1986	13895900
1987	14099400
1988	14634800
1989	14534100
1990	14566000
1991	13966200
1992	13273000
1993	13633700
1994	14645200
1995	15054600
1996	15661100
1997	16093100
1998	15873700
1999	16774800
2000	17519022
2001	16753549
2002	16016828
2003	17470433
2004	19705682
2005	23121258
2006	25230306
2007	26657989
2008	27510500
2009	27184327
2010	37778795.13790186
2011	42254442.40103398
2012	45172846.80236844
2013	43445905.818
2014	43973716.11509803
2015	47353496
2016	49115389
2017	53627313.08
2018	64496529.360006236
2019	65822245.92023504
2020	24345492.602
2021	31345507.692