Year	% gross
1970	58.2708206176758
1971	58.6752700805664
1972	59.5783500671387
1973	60.6155586242676
1974	60.9744415283203
1975	61.4521484375
1976	62.7711715698242
1977	65.8470230102539
1978	69.3351593017578
1979	73.5923690795898
1980	76.7731018066406
1981	80.1770172119141
1982	82.2322235107422
1983	82.8178329467773
1984	82.955680847168
1985	80.9716110229492
1986	78.4526214599609
1987	77.1213989257812
1988	76.4073181152344
1989	74.7991027832031
1990	73.7225570678711
1991	75.6968688964844
1992	75.4380187988281
1993	75.9611892700195
1994	76.1649780273438
1995	75.15576171875
1996	72.0771865844727
1997	73.1879806518555
1998	74.7400512695312
1999	74.3729705810547
2000	76.4927368164062
2001	78.1793975830078
2002	81.6314315795898
2003	83.4296798706055
2004	85.7158432006836
2005	88.3827362060547
2006	90.4022674560547
2007	90.4069595336914
2008	90.9570388793945
2009	91.3703308105469
2010	91.4591979980469
2011	93.1758499145508
2012	94.3355026245117
2013	94.5827102661133
2014	93.9342422485352
2015	92.7339401245117
2016	92.6985168457031
2017	93.3524398803711
2018	94.4557037353516
2019	95.51953125
2020	96.5558776855469
2021	95.5343017578125
2022	95.6986999511719