Year % gross 1992 41.0485496520996 1993 45.3634490966797 1994 48.7867889404297 1995 51.3932609558105 1996 52.4099617004395 1997 52.0707206726074 2013 63.0088806152344 2014 66.9179000854492 2015 69.0302963256836 2016 67.1135787963867 2017 67.1148910522461 2018 67.3745574951172 2019 71.3562469482422 2020 70.2061767578125 2021 72.8232421875