Year	% of total
1990	4.751868095448519
1991	3.524274842357034
1992	2.9123353293413174
1993	2.835234714003945
1994	2.835234714003945
1995	2.725028409090909
1996	3.010625083300013
1997	3.022252747252747
1998	2.611255574136009
1999	2.3646329365079364
2000	2.1394501800720285
2001	1.7418402258761003
2002	2.0043229886392044
2003	1.8520201503500189
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0