Year % 2010 8.818675236373839 2011 6.81088984818738 2012 6.65587013984799 2013 6.01277544807508 2014 5.76313634192027 2015 6.35561114023888 2016 6.2697544552194895 2017 6.29825544315463 2018 6.3876 2019 4.9844 2020 5.5036 2021 5.8847 2022 5.7127