Year	% of total
1990	48.0487235070049
1995	22.2112577987873
2000	10.9865033789703
2005	13.625178427967
2010	12.3666125003533
2011	11.045219417088
2012	1.99535674265807
2013	1.43468832400162
2014	0.857386407106242
2015	0.891277426805359
2016	0
2017	0