Year % 2004 0.005740735421558204 2005 3.3305375111499154 2006 4.707521704377555 2007 1.3024485539158939 2008 1.816946962829032 2009 1.9246993544886646 2010 3.12315587247781 2011 -1.7109984014481983 2012 3.275933782793054 2013 4.286266709852499 2014 4.216252635400199 2015 5.470839389156161 2016 7.761265133027259 2017 4.01832568832305 2018 4.515568204897022 2019 2.9317933027451866 2020 0.7396925080047232 2021 -1.4522594230780226