Year	Number
1971	91834
1972	91502
1973	93275
1974	95282
1975	91769
1976	80171
1977	86958
1978	85250
1979	85060
1980	80844
1981	74538
1982	75630
1983	74805
1984	73520
1985	71454
1986	69963
1987	62633
1988	62271
1989	65798
1990	61435
1991	60085
1992	73407
1993	79162
1994	87882
1999	64031
2001	64852
2002	64023
2005	65527
2006	66121
2007	65020
2008	69604
2009	71074
2010	70981
2011	69857
2012	70193
2013	70254
2014	70492
2015	71921
2016	71653
2017	68612
2018	67690
2019	68147
2020	67953
2021	63325