Year	Number
1977	72513
1978	65444
1981	55388
1982	53924
1983	53494
1984	52211
1985	50770
1986	48986
1987	47425
1988	46034
1989	44703
1990	43809
1991	43444
1992	43015
1993	45292
1994	46926
1995	27272
1996	23967
2011	2336
2012	3413
2015	99
2016	242
2017	342
2018	427
2019	378
2020	452
2021	802
2022	808