Year % 2008 7.62972463475248 2009 8.15787809182926 2010 8.27069932264254 2011 8.2932075613857 2012 9.47369914991514 2013 9.93087229122764 2014 8.53741171287908 2015 8.21715459074335 2016 9.60256392469865 2017 10.2612691911582 2018 10.9666434812049 2019 11.7071381480151 2020 10.1245463509826 2021 8.38151555227117 2022 8.44449217628956