Year	Number
1971	166739
1972	169717
1978	125238
1979	123708
1980	126177
1982	147825
1983	166138
1984	209884
1985	228450
1986	261667
1987	218449
1988	223962
1989	229753
1990	228791
1991	217936
1994	265251
1995	208943
1996	159077
1997	180922
1999	89400
2000	117954
2001	95805
2002	74043
2003	89760
2004	68439
2005	75743
2006	59801
2007	91815
2008	83153
2014	98079
2015	40476
2016	161030