Year	% of total
1990	0.271031364978958
1995	0.269469577098969
2000	0.370454343232485
2005	0.370451510730963
2010	0.3704577208273
2011	0.37046012438039
2012	0.370463085258754
2013	0.37046679372249
2014	0.370471429551966
2015	0.370477163093663
2016	0
2017	0