Year % 2006 12.3362680888227 2007 6.99345334721106 2008 9.00441812157209 2009 6.8155815139755 2010 5.13264404953777 2011 4.42119245549815 2012 4.59096006966281 2013 5.04358264592496 2014 5.4551197240463 2015 5.9887640736269 2016 8.58596832075201 2017 9.94912828884014 2018 12.0267293707536 2019 9.74935514062437 2020 11.8785758572125 2021 10.8864625648839 2022 11.1087250654846