Year % gross 1972 1.32671999931335 1973 1.41583001613617 1977 2.58439993858337 1979 3.72937989234924 1992 5.18536996841431 1993 6.62976980209351 1995 6.96073007583618 1998 9.05171966552734 2007 12.8842601776123 2011 16.6563892364502 2012 15.3964395523071 2018 24.3937091827393