Year	%
2000	10.4431961959435
2001	9.48869880898611
2002	9.52510157986914
2003	8.96387430518319
2004	8.01181076888072
2005	7.94154155287414
2006	7.19546998992883
2007	7.06980966381942
2008	6.34718876196331
2009	5.73146081392652
2010	5.65298401811193
2011	5.57206415212989
2012	4.9889087890114
2013	4.92229572461484
2014	4.45392359091823
2015	4.40423184519823
2016	4.26603578550222
2017	3.65965934813299
2018	3.56534676070181
2019	3.46636972274314
2020	3.13021000603877