Year	Number
1972	45763
1973	24128
1974	18598
1979	27959
1980	24039
1981	32457
1982	26402
1983	13931
1984	19786
1985	25530
1986	24804
1987	18488
1988	14464
1989	17128
1990	21991
1991	22289
1992	17858
1993	20206
1994	19459
1995	22241
1996	7184
2003	75
2005	2247
2006	6770
2007	1625
2008	6462
2009	4721
2010	5740
2011	9174
2012	8429
2013	2081
2014	9565
2015	10336
2016	10124
2017	10853
2018	10334
2019	9738
2020	8064
2021	9014
2022	18547