Year	Number
1970	5689700
1971	5878600
1972	5692700
1973	7016200
1974	7448000
1975	8641400
1976	10454700
1977	10949400
1978	12226000
1979	13405100
1980	15052000
1981	16345900
1982	16812500
1983	17321300
1984	17936400
1985	18469200
1986	18380600
1987	18304400
1988	19517000
1989	19165800
1990	20082400
1991	19161600
1992	23666100
1993	22612600
1994	22954600
1995	22288600
1996	21922600
1997	22744600
1998	22961000
1999	23392800
2000	23621423
2001	23699857
2002	21700384
2003	22216651
2004	25905542
2005	28043085
2006	30339043
2007	31490994
2008	31956149
2009	31678543
2010	44610898.77558336
2011	52675053.86677591
2012	54667963.651755035
2013	56037107.39122866
2014	58618240.98738684
2015	60040021
2016	62736598
2017	67552489.63031113
2018	77987583.39579992
2019	76480055.15019548
2020	32754952.523000002
2021	40880095.111999996