Year	% gross
1970	4.48457002639771
1971	4.85515022277832
1972	5.4025502204895
1973	6.03338003158569
1977	7.79495000839233
1978	9.19285011291504
1979	11.1707096099854
1980	13.9374599456787
1981	17.4092597961426
1982	21.3087997436523
1983	25.4296607971191
1984	29.2429695129395
1985	29.6929607391357
1986	27.5682201385498
1987	27.420539855957
1989	24.213399887085
1990	24.6007099151611
1999	23.5453395843506
2000	24.7493305206299
2001	27.319450378418
2002	29.9248199462891
2004	35.275520324707
2005	35.1121101379395
2006	34.4249801635742
2007	31.5662994384766
2008	34.8519096374512
2009	38.4990310668945
2010	43.3236885070801
2011	44.6314888000488
2012	46.1335983276367
2013	54.8829689025879
2014	44.5147514343262
2015	45.6085815429688
2016	40.9102096557617
2018	42.1684494018555
2020	45.889949798584
2021	47.2372283935547