Year % gross 2002 6.71679019927979 2003 7.39170980453491 2004 7.73430013656616 2005 7.55735015869141 2006 8.52995014190674 2008 9.80391979217529 2012 10.0628900527954 2013 11.6071395874023 2014 11.0764398574829 2015 10.9222097396851 2016 12.7475900650024 2017 13.7897796630859 2018 14.226710319519 2019 13.7716598510742 2020 14.5988597869873 2021 13.8689403533936 2022 33.8593292236328