Year	% gross
1971	107.712188720703
1972	109.425201416016
1973	110.18189239502
1974	110.447547912598
1975	105.952163696289
1976	106.728408813477
1977	107.482292175293
1978	103.4765625
1979	98.5467681884766
1980	95.1048965454102
1981	95.5191497802734
1982	96.879150390625
1983	98.6621322631836
1984	102.162422180176
1985	104.504577636719
1986	105.985412597656
1987	105.091438293457
1988	103.667747497559
1989	101.050537109375
1990	99.378303527832
1991	101.072059631348
1992	103.942253112793
1993	107.287857055664
1994	108.190521240234
1995	109.566902160645
1996	114.385299682617
1997	115.230407714844
2012	103.698806762695
2013	110.639839172363
2014	111.140930175781
2015	103.086898803711
2016	117.062149047852
2017	83.1281661987305
2018	93.9222793579102
2019	97.324089050293
2020	95.3951416015625