Year	Number
1963	11638
1964	11896
1965	11878
1966	11724
1967	11468
1968	11132
1969	10717
1970	10232
1971	9668
1972	9047
1973	8331
1974	7504
1975	6595
1976	5695
1977	4869
1978	4104
1979	3545
1980	3174
1981	2898
1982	2897
1983	2968
1984	2908
1985	2826
1986	2755
1987	2707
1988	2679
1989	2606
1990	2485
1991	2296
1992	2071
1993	1880
1994	1718
1995	1594
1996	1477
1997	1418
1998	1382
1999	1317
2000	1236
2001	1150
2002	1094
2003	1037
2004	956
2005	874
2006	801
2007	754
2008	757
2009	778
2010	780
2011	782
2012	775
2013	761
2014	756
2015	759
2016	758
2017	753
2018	774
2019	790
2020	791
2021	797
2022	814