Year	Number
1978	1000
1979	1000
1980	1000
1981	150
1982	2200
1983	1230
1984	10950
1985	11750
1986	11290
1987	9620
1988	9241
1989	7732
1990	7099
1991	6098
1992	6686
1993	7670
1994	8461
1995	9600
1996	10175
1997	8198
1998	8198
1999	6664
2000	5862
2001	4941
2002	4941
2003	7491
2004	7626
2005	10001
2006	10182
2007	10000
2008	10005
2009	9704
2010	9699
2011	9378
2012	9378
2013	9373
2014	9503
2015	9503
2016	9529
2017	10018
2018	10022
2019	9698
2020	10781
2021	11839
2022	10524
2023	10523