Year annual % change 2009 16.6780416883 2010 17.389081356802706 2011 -1.2948006779361 2012 -3.47325729988206 2013 39.8671680713953 2014 -3.95724955177771 2015 -45.6083737225729 2016 -19.3295925225028 2017 36.6057462627072 2018 -18.7729104032677 2019 -37.4102903549424 2020 -36.9712735615485 2021 135.728681648744 2022 23.7645428329144