Year	Number
1971	132577
1972	141219
1973	158299
1974	156476
1975	160271
1976	171032
1977	182314
1978	184123
1979	187027
1981	212456
1982	212795
1983	211461
1984	208891
1985	209395
1986	212717
1987	216859
1988	220943
1989	220947
1990	224672
1991	225852
1992	234961
1993	235721
1994	237943
1995	233073
2012	319369
2013	282043
2014	288444
2015	295252
2016	302961
2017	292878
2018	297176
2019	300732
2020	309247
2021	306937