Year	% gross
1971	86.0214080810547
1972	89.9892578125
1973	91.295280456543
1974	98.3274536132813
1975	99.4177398681641
1976	104.928077697754
1977	104.683639526367
1978	104.29842376709
1979	101.893547058105
1980	100.401649475098
1981	101.241523742676
1982	103.99870300293
1983	109.054817199707
1984	114.94450378418
1985	117.658149719238
1986	118.743812561035
1987	114.69734954834
1988	109.971710205078
1989	106.127510070801
1990	107.611167907715
1991	108.677719116211
1992	109.997291564941
1993	111.340118408203
1994	113.06591796875
1995	113.02027130127
1996	112.5712890625
1997	111.542976379395
1998	110.608108520508
1999	108.907531738281
2000	108.327590942383
2001	108.500282287598
2002	108.197021484375
2003	107.760749816895
2004	106.507621765137
2005	110.088218688965
2006	109.469192504883
2007	108.951889038086
2008	108.316040039063
2009	107.049667358398
2010	105.602882385254
2011	105.405616760254
2012	104.723503112793
2013	104.852470397949
2014	104.136001586914
2015	105.061340332031
2016	105.251510620117
2017	105.844421386719
2018	105.713981628418
2019	105.772438049316
2020	106.011947631836