Year	%
2000	0.597296148296224
2001	0.587786304710724
2002	0.573920122454704
2003	0.603490441951804
2004	0.604186930257361
2005	0.550103876320346
2006	0.580427709274188
2007	0.606055947559299
2008	0.618605569519772
2009	0.597379915726591
2010	0.546649105245142
2011	0.529967800892096
2012	0.529186729036615
2013	0.523452783961836
2014	0.436253373454207
2015	0.452054726573942
2016	0.347933846814829
2017	0.320238613448782
2018	0.271918414505547
2019	0.27518788519005
2020	0.287091945804871