Year	%
2000	10.1614824756317
2001	9.99852915107108
2002	9.19763918705737
2003	8.94698406762772
2004	8.76062247286843
2005	8.83481060913759
2006	8.93344142749273
2007	9.0211246154291
2008	8.50122732777299
2009	8.94384162810697
2010	8.90437610803731
2011	8.79295873441104
2012	8.49081007722133
2013	8.36449779028554
2014	7.50465932875253
2015	7.41236212252408
2016	7.54218793856023
2017	6.87483822432079
2018	6.77640776533252
2019	6.61290654171371
2020	6.71580062390881