Year	Number
1976	53000
1977	55000
1978	60000
1979	65000
1980	75000
1981	103100
1982	104000
1983	122200
1984	127000
1985	128200
1986	150000
1987	174000
1988	176200
1989	176700
1990	176900
1991	96000
1992	100000
1993	100000
1994	118300
1995	124200
1996	129200
1997	237000
1998	236100
1999	252300
2000	263547
2001	242799
2002	236577
2003	252751
2004	560000
2005	690000
2006	753511
2007	793153
2008	807957
2009	776469
2010	570553
2011	620394.751123946
2012	597982.600368215
2013	600000
2014	590304
2015	548908
2016	565810
2017	336718
2018	561944
2019	675482
2020	226645.666
2021	76354.068