Year % 2010 9.27355570762364 2011 5.72832384196684 2012 3.57433837836802 2013 7.02695775360135 2014 4.6845586921618 2015 4.13158152400069 2016 3.8430068325085 2017 6.36399930775808 2018 7.11590121991795 2019 10.4015387469367 2020 10.737455611561 2021 10.4324537749556