Year	Number
1970	113673
1971	117275
1972	136508
1973	155742
1974	150267
1975	164717
1976	172448
1977	174384
1978	186144
1979	187504
1980	153859
1981	149909
1983	171349
1984	189884
1985	189900
1986	190557
1987	191507
1988	191399
1989	186872
1990	189508
2005	344806
2006	344914
2007	364494
2008	365925
2009	361450
2010	395281
2011	458389
2015	527798
2016	548201
2017	574001
2018	576887
2021	359095
2022	359095