Year	% gross
1970	80.0506973266602
1971	79.9745407104492
1972	80.9892501831055
1973	81.7831268310547
1974	82.9867324829102
1975	83.5144500732422
1976	84.2337112426758
1977	85.2596206665039
1978	85.8510437011719
1979	85.4820022583008
1980	89.2510604858398
1981	89.4909286499023
1982	90.746208190918
1983	91.0494537353516
1984	91.7584991455078
1985	91.5967330932617
1986	93.0094375610352
1987	93.7983322143555
1988	94.1160736083984
1989	94.6681518554688
1990	94.9518966674805
1991	95.5691604614258
1992	96.5354537963867
1993	98.7075119018555
1994	100.624389648438
1995	100.736518859863
1996	101.270980834961
1997	101.021530151367
1998	100.080741882324
1999	100.408828735352
2000	100.648681640625
2001	101.261047363281
2002	101.66040802002
2003	101.813331604004
2004	101.202018737793
2005	101.712280273438
2006	101.557228088379
2007	101.696212768555
2008	102.047813415527
2009	102.339309692383
2010	103.071578979492
2011	102.732780456543
2012	102.777938842773
2013	105.580909729004
2014	105.863372802734
2015	105.670532226562
2016	105.510467529297
2017	105.644897460938
2018	104.983940124512
2019	105.156753540039
2020	104.829322814941
2021	104.978736877441
2022	104.977188110352