Year % 2010 1.13237045139299 2011 0.961585528954036 2012 0.953674330051852 2013 0.999702805112438 2014 1.24873335628106 2015 1.67388016445151 2016 1.74447934478824 2017 1.74435460635256 2018 1.83294883223349 2019 1.86175485330958 2020 1.83961969163289 2021 1.72739169215062