Year	% of total
1990	100
1995	100
2000	100
2005	96.7488212220614
2010	96.7104772879604
2011	96.9102967235002
2012	97.0739414995571
2013	75.1883594834901
2014	92.9813001171061
2015	100
2016	100
2017	100