Year % 2004 0 2008 23.84755 2010 22.37655 2011 22.61592 2012 11.49796 2013 23.89189 2014 14.58964 2015 15.22128 2016 4.703663 2017 3.770138 2018 1.047447 2019 2.583997 2020 0.8209845 2021 3.114788