Year	% gross
1970	8.70648002624512
1971	9.10828018188477
1972	9.54835987091064
1973	9.93671035766602
1974	10.5132999420166
1975	11.5524396896362
1976	13.1012802124023
1977	14.4537801742554
1978	15.5522298812866
1979	17.0678100585938
1980	18.2021007537842
1981	20.5351600646973
1982	23.4430599212646
1983	25.6837196350098
1984	28.2799396514893
1985	30.138240814209
1986	32.454418182373
1987	39.3311500549316
1988	39.8506889343262
1989	40.2594604492188
1990	43.6268081665039
1991	42.2168197631836
1992	44.4040298461914
1993	46.0478515625
1994	46.8706588745117
1995	48.7965393066406
1996	50.3440704345703
1997	51.3330116271973
1998	52.8428611755371
1999	54.1054000854492
2000	55.6678504943848
2001	56.5673217773438
2002	57.0687408447266
2003	57.9961318969727
2004	59.1178016662598
2005	61.5330009460449
2006	63.7603302001953
2007	65.4560317993164
2008	67.662971496582
2009	68.7963333129883
2010	74.6657485961914
2011	77.1211700439453
2012	77.1260070800781
2013	71.2646713256836
2014	73.1828918457031
2015	73.7864685058594
2016	75.3396377563477
2017	76.2833786010742
2018	76.5534896850586
2019	77.2123031616211
2020	76.1438522338867