Year	% gross
1970	71.807502746582
1971	66.1932601928711
1972	69.8918533325195
1973	70.9350814819336
1974	72.5856323242188
1975	72.5521087646484
1976	71.9097518920898
1977	70.2881393432617
1978	63.8328590393066
1979	63.5265617370605
1980	90.7835006713867
1981	111.982406616211
1982	120.144378662109
1983	124.29077911377
1984	124.253601074219
1985	125.36247253418
1986	124.591720581055
1987	117.647033691406
1988	108.782150268555
1989	103.775329589844
1990	94.880500793457
1991	99.3127136230469
1992	97.4236679077148
1993	99.0639038085938
1995	102.874298095703
1996	105.010971069336
1997	107.934776306152
1998	108.907287597656
1999	109.770378112793
2000	111.361442565918
2001	116.35954284668
2002	111.178100585938
2003	109.501441955566
2012	103.768783569336
2013	103.131477355957
2014	102.421997070312
2015	101.521049499512
2016	100.03108215332
2017	98.5450973510742
2018	97.8792724609375
2019	97.4766082763672
2020	97.384162902832
2021	96.0149993896484
2022	95.7900009155273