Year	Number
1970	7318700
1971	7326600
1972	7795600
1973	9384600
1974	10664700
1975	11055100
1976	10864300
1977	11306500
1978	12122300
1979	13022500
1980	13648800
1981	13219500
1982	13187900
1983	12601500
1984	13236800
1985	14412100
1986	15497300
1987	16880200
1988	18816300
1989	15114300
1990	17553400
1991	21860100
1992	23886600
1993	26929300
1994	26888500
1995	28831400
1996	30075100
1997	30953500
1998	30185700
1999	31579700
2000	32577569
2001	33477398
2002	39021581
2003	41386432
2004	41596552
2005	44657324
2006	46951775
2007	48728837
2008	51488427
2009	50026967
2010	60640913
2011	63360310.3377656
2012	66355274
2013	68197955
2014	68123237.6693167
2015	69779346
2016	72446421
2017	74257326
2018	75667645.0347507
2019	76850596.719
2020	23346254
2021	24572955