Year	%
2000	34.30659490321384
2001	33.57449469084692
2002	32.965805316902475
2003	32.35544321556022
2004	31.722854354026374
2005	31.00524414808617
2006	30.292813579843962
2007	29.55560973570164
2008	28.872251137272723
2009	28.206577793586426
2010	27.57711278129506
2011	27.14144170957599
2012	26.80195477310056
2013	26.597005159833508
2014	26.467123323382598
2015	26.47560050827649
2016	26.581962068581042
2017	26.490615421867076
2018	26.42196405203154
2019	26.422853620978906