Year % gross 2010 86.9789962768555 2011 86.9720001220703 2012 85.7829971313477 2013 85.0759963989258 2014 84.9489974975586 2015 86.4990005493164 2016 76.2300033569336 2017 78.1589965820312 2018 94.4800796508789 2019 94.7754898071289 2020 81.7582626342773 2021 81.6576919555664 2022 80.630500793457