Year	% gross
1970	120.172958374023
1971	124.864677429199
1972	122.970611572266
1973	124.110168457031
1974	123.05436706543
1975	121.678749084473
1976	117.838882446289
1977	122.861518859863
1978	127.582473754883
1979	133.979690551758
1980	135.243789672852
1981	132.287490844727
1982	136.230026245117
1983	131.560684204102
1984	138.046951293945
1985	134.274475097656
1987	130.363708496094
1988	136.820465087891
1989	131.281356811523
1990	142.505386352539
1991	131.619064331055
1992	132.125915527344
1993	132.893035888672
1994	136.602127075195
1997	143.482223510742
1999	148.712951660156
2012	104.7822265625
2013	109.945137023926
2014	110.316459655762
2015	109.152183532715
2016	108.757843017578
2017	109.80850982666
2018	108.623291015625
2019	107.407470703125
2020	105.498199462891
2021	103.4716796875