Year	Total
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	0
1996	461
1997	556
1998	650
1999	800
2000	1200
2001	7710
2002	12173
2003	23786
2004	41838
2005	52000
2006	71500
2007	89000
2008	91000
2009	98500
2010	105567
2011	108924
2012	109300
2013	93575
2014	73886
2015	77254
2016	78444