Year	% of total
2000	34.46601941747573
2001	25.555555555555554
2002	25.13089005235602
2003	23.711340206185564
2004	25.365853658536587
2005	30.131004366812224
2006	22.477064220183486
2007	31.25
2008	22.807017543859647
2009	25.680933852140075
2010	30.034129692832767
2011	25.438596491228072
2012	36.340852130325814
2013	45.82392776523702
2014	43.340857787810386
2015	57.6271186440678