Year	% gross
1971	3.99642992019653
1972	5.10129976272583
1973	6.21925020217896
1974	8.07726955413818
1975	8.44270038604736
1976	10.115909576416
1977	11.1419095993042
1978	12.6183300018311
1979	11.8584203720093
1980	12.0574703216553
1981	12.8421497344971
1982	13.1084003448486
1983	14.4662704467773
1984	14.1032495498657
1985	15.55309009552
1986	16.4591102600098
1987	17.3654098510742
1988	18.2306995391846
1989	19.1109199523926
1990	17.8315601348877
1992	23.6226997375488
1993	22.1365699768066
1994	22.2647705078125
1995	27.8391799926758
1996	29.5994491577148
1997	28.7255096435547
1999	29.0046005249023
2001	27.3452606201172
2002	28.4098796844482
2003	28.8444194793701
2004	28.7194309234619
2014	70.1455307006836
2015	79.9646606445312
2016	84.206298828125
2017	78.0161666870117
2018	74.46630859375
2019	72.0546798706055
2020	73.6944580078125
2021	76.0997009277344