Year	% gross
1970	0.768959999084473
1971	0.74466997385025
1972	0.850160002708435
1974	0.887340009212494
1975	0.853579998016357
1976	0.765349984169006
1977	0.848429977893829
1979	0.798690021038055
1980	0.760330021381378
1981	0.836719989776611
1982	0.866089999675751
1985	1.14604997634888
1986	1.13131999969482
1988	1.33402001857758
1989	1.34820997714996
1990	1.52093005180359
1991	1.79199004173279
1992	1.72369003295898
1993	1.84030997753143
1994	1.9959499835968
1995	2.10989999771118
1996	2.399090051651
1999	2.58076000213623
2000	3.49363994598389
2001	3.78153991699219
2002	4.4226598739624
2003	4.78196001052856
2004	4.56217002868652
2006	4.07319021224976
2008	4.26387977600098
2009	4.69228982925415
2010	4.40287017822266
2011	4.93770980834961
2012	4.3434100151062
2013	4.61199998855591
2014	5.18859004974365
2015	5.51100015640259
2016	5.35799980163574