Year	% of total
1990	1.05012734158624
1995	1.09573861603585
2000	2.96759908715334
2005	6.24420370648061
2010	5.63210412167717
2011	5.80624142523846
2012	2.6092034694315
2013	2.58123581699289
2014	2.55365724725127
2015	2.52649158489949
2016	0
2017	0