Year	% of total
1990	42.9506593310291
1995	39.1941665396791
2000	36.3957950944398
2005	7.45452968068004
2010	1.99807475576025
2011	0.38057954242825
2012	6.32397250238652
2013	0
2014	0.020412666169034
2015	33.9967589054326
2016	44.4347287480064
2017	45.0632690169155