Year	% of total
1990	0
1995	0
2000	20
2005	20
2010	20
2011	20
2012	9.99999999999999
2013	9.99999999999999
2014	9.99999999999999
2015	9.99999999999999
2016	9.99999999999999
2017	9.99999999999999