Year % 2009 2.71061566979647 2010 2.11039674737654 2011 1.60613239480949 2012 1.34453970286515 2013 1.19312533153281 2014 1.28775491932621 2015 1.34732299472207 2016 2.05475436425969 2017 2.32399816309541 2018 2.17622104946276 2019 2.20127204363775 2020 1.83008750356037 2021 1.72976919973524 2022 1.25341986613831