Year	% of total
1990	4.791238877481177
1991	4.697986577181208
1992	0.03034210725934916
1993	0.03956635277360133
1994	0.038109756097560975
1995	0.04081632653061225
1996	0.04950495049504951
1997	0.05264266161297116
1998	0.0637213254035684
1999	0.0564334085778781
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0