Year	Number
1971	111657
1972	110283
1973	110958
1974	112780
1975	113513
1976	113079
1977	112456
1978	111832
1979	109043
1980	102084
1981	99845
1982	97623
1983	99045
1984	99763
1985	103441
1986	53647
1987	55468
1988	59160
1989	60822
1990	61195
1991	62307
1992	68947
1993	71480
1994	10800
1995	10267
1996	12615
1997	14913
2017	2274
2018	2928
2019	1416
2020	1937
2021	2114