Year	% of total
2000	65.53398058252428
2001	74.44444444444444
2002	74.86910994764398
2003	76.28865979381443
2004	74.63414634146342
2005	68.99563318777294
2006	76.60550458715596
2007	67.85714285714286
2008	75.87719298245614
2009	73.15175097276264
2010	68.94197952218431
2011	74.56140350877193
2012	63.65914786967418
2013	53.27313769751692
2014	55.75620767494357
2015	41.6195856873823