Year % 2008 2.46770774737079 2009 2.54935039632589 2010 2.04404090102814 2011 1.9136648910421 2012 1.88139597722178 2013 1.97868298750605 2014 0.997774216883436 2015 0.885556331578598 2016 0.860695208457364 2017 1.03939161148378 2018 2.42627992263709 2019 3.1014166686564 2020 3.69993192919397 2021 2.44502366023589 2022 1.53694584636603