Year	Number
1969	500
1970	500
1974	10000
1975	5000
1978	150
1983	1000
1984	1000
1985	1200
1986	1580
1987	2120
1988	2160
1989	3401
1990	2990
1991	3395
1992	3385
1993	13646
1994	15522
1995	19404
1996	20451
1997	20700
1998	27176
1999	39870
2000	123190
2001	119146
2002	109201
2003	91362
2004	68536
2005	66075
2006	55788
2007	38472
2008	24771
2009	111403
2010	133099
2011	141224
2012	98446
2013	51033
2014	54842
2015	44952
2016	46454
2017	48509
2018	37491
2019	25668
2020	27097
2021	40765
2022	41557
2023	60637