Year	% of total
1990	12.1950829477853
1995	12.7496636191242
2000	4.73216480363721
2005	4.72435423630344
2010	2.66037501007785
2011	9.55272052593383
2012	3.87823875346707
2013	4.69547978127616
2014	0
2015	0
2016	0
2017	0