Year	Number
1960	0
1965	0
1970	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	64
1995	121
1996	154
1997	207
1998	220
1999	300
2000	365
2001	350
2002	4900
2003	7800
2004	10504
2005	12692
2006	15000
2007	26000
2008	36000
2009	131682
2010	169935
2011	136956
2012	146084
2013	127244
2014	156051
2015	174818
2016	218603
2017	228016
2018	251428
2019	265219
2020	246232
2021	249868
2022	255509