Year % 2008 3.59414947955595 2009 4.50936302926019 2010 5.82172259923197 2011 9.98623419964975 2012 18.3749456234796 2013 38.5570399026523 2014 44.972072758843 2015 47.7478457712877 2016 36.6991177413136 2017 31.3888946804868 2018 19.520510219693 2019 17.0931036488541 2020 15.0190835443793 2021 8.99828242700788 2022 7.65863990451332