Year	%
2000	24.543738377844956
2001	24.291010148548725
2002	24.17972725028513
2003	24.03056788555947
2004	23.866329553999268
2005	23.794888344962484
2006	23.55499604195744
2007	23.231363593704273
2008	22.941777492936453
2009	22.700413484339258
2010	22.47982941433814
2011	22.15978998409453
2012	21.90759407286732
2013	21.76051088281578
2014	21.559696957190443
2015	21.35129198596122
2016	21.220939590297665
2017	21.030279427468475
2018	20.91848339482186
2019	20.785452901558884