Year % gross 2007 82.0088195800781 2008 85.7300720214844 2009 86.8752288818359 2010 84.1591186523438 2011 84.8701324462891 2012 85.5443878173828 2013 84.8702163696289 2014 84.854377746582 2015 83.4225997924805 2016 83.2630996704102 2017 84.4929885864258 2018 86.3890533447266 2019 85.9465713500977 2020 85.5843276977539 2021 85.2908096313477 2022 85.5617370605469 2023 84.1500015258789