Year	% of total
2005	82.82676616915423
2006	57.696376146788985
2007	48.718714285714285
2008	56.163717472118954
2009	46.728057142857146
2010	62.964379844961236
2011	65.97712598425197
2012	64.683991416309
2013	64.13211453744493
2014	63.92472972972973
2015	63.39559322033899
2016	56.13464454976304