Year	% gross
1970	0.991129994392395
1971	0.995689988136292
1972	1.06982004642487
1973	1.1742399930954
1974	1.2733199596405
1975	1.33473002910614
1976	1.48054003715515
1977	1.71324002742767
1978	1.92820000648499
1979	2.33343005180359
1980	2.57590007781982
1981	2.98967003822327
1982	3.18142008781433
1983	3.32778000831604
1984	3.42486000061035
1985	3.71321988105774
1986	3.91302990913391
1987	3.80099010467529
1988	4.17297983169556
1989	4.38890981674194
1990	4.46255016326904
1991	4.51986980438232
1992	4.62594985961914
1993	4.79495000839233
1994	4.90567016601562
1995	4.99251985549927
1996	5.14212989807129
1997	5.33959007263184
1998	5.43103981018066
1999	5.52080011367798
2000	6.27665996551514
2001	6.91356992721558
2002	7.565269947052
2003	8.22402954101562
2004	8.38646984100342
2005	8.88928031921387
2006	8.96247005462646
2007	9.23486042022705
2008	9.57437992095947
2009	9.66977977752686
2010	10.0283002853394
2011	10.4979496002197
2012	10.9361600875854
2013	11.5301599502563
2014	11.8257102966309
2015	11.7547101974487
2016	11.4592599868774
2017	11.6110095977783
2018	11.719090461731
2019	11.7052001953125
2020	11.8190803527832