Year	%
2000	35.633006759881056
2001	35.21167137119354
2002	34.93999764149061
2003	34.70533102894616
2004	34.38805145117346
2005	34.051559627913576
2006	33.68580347334361
2007	33.361047778248846
2008	32.97358672408364
2009	32.537227524117064
2010	32.19455828844348
2011	31.851453142723688
2012	31.649472486199127
2013	31.52853106112829
2014	31.3657012884979
2015	31.090527643695154
2016	30.943504537325058
2017	30.84905806988461
2018	30.779804454538112
2019	30.75888651032516