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	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	100
2003	5869
2004	12782
2005	14094
2006	18616
2007	27436
2008	27500
2009	27500
2010	27518
2011	27600
2012	31213
2013	31393
2015	22505
2016	23412
2017	23114