Year	%
2000	28.546986506004636
2001	28.1556266275115
2002	27.873201487502282
2003	27.638212478788777
2004	27.301512106025868
2005	26.84647140051547
2006	26.35885717042077
2007	25.799273571225612
2008	25.206866160640615
2009	24.610572456648963
2010	24.047998015956676
2011	23.564340357417397
2012	23.133366253501258
2013	22.77373307044534
2014	22.507150736461924
2015	22.267868391245365
2016	22.068819115675126
2017	21.969050497497566
2018	21.880396512378258
2019	21.850144771585388