Year	% gross
1970	11.4947700500488
1971	13.976149559021
1972	15.4156398773193
1973	18.1059703826904
1974	20.8497295379639
1975	25.9682006835938
1976	26.0209102630615
1977	23.0633602142334
1978	21.4616203308105
1979	22.1656303405762
1980	22.10671043396
1981	24.9668102264404
1982	25.7286891937256
1983	27.1345291137695
1984	31.0237903594971
1985	37.752140045166
1986	40.2584991455078
1987	42.5585098266602
1999	62.4167404174805
2000	66.8404769897461
2001	70.9192733764648
2002	74.9215316772461
2003	78.1919326782227
2004	76.8219680786133
2005	76.199592590332
2006	81.7862014770508
2007	81.5674362182617
2008	83.9635467529297
2009	86.3935623168945
2010	90.1613922119141
2011	95.4348068237305
2012	96.9466323852539
2013	98.1933822631836
2014	101.44214630127
2015	105.110038757324
2016	109.32640838623
2017	112.828277587891
2018	114.81436920166
2019	120.815391540527
2020	127.155448913574
2021	140.297622680664