Year	% of total
1990	100
1995	100
2000	100
2005	73.6176932721489
2010	70.5129304324258
2011	95.4290779288742
2012	94.7184061149108
2013	93.8896835741796
2014	45.6934284644686
2015	100
2016	100
2017	100