Year % 2010 5.69841005452576 2011 5.60078770656019 2012 7.16122893927306 2013 8.13319885151951 2014 7.9569987721034 2015 5.83242585494619 2016 4.66130242044662 2017 2.93417258582566 2018 2.56894447422836 2019 1.93256959783446 2020 2.47418317289528 2021 2.13270464070687 2022 1.93873042358907