Year % 2001 11.030854350754366 2002 16.294942381801395 2003 17.10460325215203 2004 16.205760679315297 2005 11.245180309409111 2006 10.3804081212953 2007 13.031095566666732 2008 12.15907476679767 2009 17.666669250185368 2010 17.671256390291592 2011 13.231008952851123 2012 11.208381326648146 2013 14.755735431320508 2014 13.144699797451361 2015 15.718147802974219 2016 10.974493792835222 2017 6.571905915341585 2018 7.738978671463356 2019 9.152317914831759 2020 8.96647125320645 2021 13.94544443729672 2022 12.952274737257103 2023 10.83295275355623