Year	% of total
2005	34.8463687150838
2006	40.71815718157182
2007	40.11194029850746
2008	45.57991513437058
2009	24.963768115942027
2010	31.62605668821482
2011	54.668674698795186
2012	48.06610407876231
2013	36.52724968314322
2014	44.784115978569176
2015	50.349650349650354