Year % gross 1970 4.19638013839722 1972 3.90132999420166 1976 3.72715997695923 1982 5.28869009017944 1983 5.49525022506714 1984 7.27609014511108 1985 8.18875026702881 1993 11.3035697937012 1995 13.886269569397 1996 14.9205503463745 1999 16.0121402740479 2000 15.7184200286865 2001 15.9681100845337 2002 15.6944103240967 2003 17.4696998596191 2004 17.9362106323242 2006 17.462610244751 2007 17.6026401519775 2008 21.3310508728027 2009 23.1524906158447 2010 24.7478694915771 2011 26.7422103881836 2012 28.3287601470947 2013 28.3118896484375 2014 28.4416007995605 2015 31.0060195922852 2016 33.0921287536621 2017 34.0581398010254 2018 34.1368598937988 2019 35.7709999084473 2020 35.9970016479492 2021 37.6990013122559 2022 38.50830078125