Year % (cumulative) 2006 0.50878632068634 2007 1.05044853687286 2008 0.989820241928101 2009 0.931388437747955 2010 0.916753888130188 2011 1.00818431377411 2012 1.07440972328186 2013 1.12614071369171 2014 31.3127212524414 2015 32.3081283569336 2016 34.9200897216797 2017 36.9775695800781 2018 38.9894828796387 2019 36.142879486084 2020 36.6183090209961 2021 34.156925201416 2022 34.2301330566406