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	0
1995	300
1996	302
1997	120
1998	130
1999	140
2000	180
2001	236
2002	3354
2003	11200
2004	16400
2005	29872
2006	30051
2007	46525
2008	50472
2009	53000
2010	54300
2011	55000
2012	56000
2013	57500
2014	68000
2015	73493
2016	80000
2017	107938
2018	107938
2019	62104
2020	62000
2021	64328