Year	%
2000	28.58377502173292
2001	28.185963182345397
2002	27.79907718955947
2003	27.580409745952533
2004	27.256855131032783
2005	26.9910567281165
2006	26.80861461167012
2007	26.54280239560507
2008	26.372321604465824
2009	26.077077295126067
2010	25.724706804585416
2011	25.3877026528107
2012	25.013960787297606
2013	24.67109789434693
2014	24.268489088385678
2015	24.002196371861665
2016	23.701247953084035
2017	23.36415890463948
2018	23.04206719814632
2019	22.753506306115998