Year	Number
1971	50147
1972	52625
1978	27031
1979	27176
1980	28746
1982	39070
1983	52095
1984	72713
1985	81830
1986	99962
1987	70323
1988	73243
1989	75202
1990	75753
1991	70454
1994	94583
1995	63654
1996	33588
1997	46401
2001	9941
2003	9615
2004	447
2005	6547
2007	18669
2008	15941
2014	30899
2016	59701