Year % 2008 1.9446847760978 2009 5.20231138473194 2010 5.37548640616725 2011 4.04580581090276 2012 2.62266859406297 2013 1.47462231497042 2014 1.38823609881308 2015 2.76894770314042 2016 2.17676369026511 2017 2.37887496554021 2018 1.55123999961087 2019 1.97424852159292 2020 1.64284699281484 2021 1.08679556479312 2022 0.801295827497159