Year % 2009 7.70964610650411 2010 8.22683150016243 2011 7.91414049506706 2012 8.30221130365328 2013 8.27387493552104 2014 7.93762814340674 2015 9.01055609907528 2016 9.87097594297722 2017 9.77861563123438 2018 9.94951991406034 2019 9.85981341337905 2020 10.2885446368503