Year % 2010 49.9013229069412 2011 4.6968178252385 2012 4.95890140377645 2013 4.85228704838131 2014 7.7810908959605 2015 12.0536179767696 2016 11.0743789647307 2017 12.2018301907814 2018 8.88666018352578