Year	%
2000	30.9980901533267
2001	30.550972785473128
2002	30.173990529631165
2003	30.007007873997082
2004	29.872294088147605
2005	29.64389734359075
2006	29.11587591915806
2007	28.875384801490483
2008	28.50171757684209
2009	27.84725046666783
2010	27.32901141465084
2011	27.023498643612264
2012	26.759645132330792
2013	26.314020476986784
2014	26.060291812691773
2015	25.648255145446203
2016	25.387896862256724
2017	25.033637197643714
2018	25.006900426745208
2019	24.77018171000145