Year	%
2000	16.451312997371872
2001	16.063862311207153
2002	15.895802713327301
2003	15.75887664291047
2004	15.521855702704956
2005	15.078112735314335
2006	14.893895321040004
2007	14.613197945794168
2008	14.591265365637641
2009	14.366606816277342
2010	14.224692280145923
2011	13.992624958074757
2012	13.77935598608607
2013	13.536584075984084
2014	13.390998484606644
2015	13.387578471014548
2016	13.428525206369189
2017	13.143150381586386
2018	12.971020707811125
2019	12.865523306933218