Year	Number
1975	7000
1976	10000
1977	13000
1978	20000
1979	25000
1980	27000
1981	33800
1982	34000
1983	38000
1984	40000
1985	60000
1986	65000
1987	8400
1988	8400
1989	8400
1990	9400
1991	9400
1992	9400
1993	9400
1994	38500
1995	158600
1996	206900
1997	188900
1998	247200
1999	261100
2000	315108
2001	56216
2002	57902
2003	60218
2004	75875
2005	81945
2006	93417
2007	92483
2008	91096
2009	85448
2014	1024693.84477856
2015	1313533
2016	1409704
2017	1485752
2018	1191383.08265957
2019	1221786.67512409
2020	292931
2021	277881.434