Year	Number
1972	54358
1974	43053
1976	40079
1978	30725
1979	28761
1980	50642
1981	51996
1982	48243
1983	44805
1984	38981
2005	277889
2006	263283
2010	91268
2012	81471
2015	393205
2018	188172