Year	% of total
1990	17.4082906087933
1995	0.0518357813769632
2000	0.0504999349027924
2005	0.17602926478304
2010	11.8831308543839
2011	16.0075155239148
2012	0.0892749635345358
2013	0.088564082329179
2014	0.169311430789154
2015	0.173717183196898
2016	0.172066740700039
2017	0.170271457079296