Year	%
2001	20.32642218190294
2002	30.08760992767172
2003	22.784908544245887
2004	28.3742727439966
2005	28.727138218733305
2006	39.243640492674544
2007	45.454289633824615
2008	36.02979934638226
2009	38.40389498150743
2010	40.37769912345298
2011	31.928131060816835
2012	36.51482557773836
2013	27.903895168536575
2014	27.918467208947632
2015	23.06329940194204
2016	17.723841875658607
2017	18.831126253109367
2018	20.618262549626493
2019	22.789630662093032