Year	% gross
1971	80.2797012329102
1972	82.1080169677734
1973	83.2194671630859
1974	83.8351211547852
1975	83.6702728271484
1976	83.7607727050781
1977	85.0422973632812
1978	87.5944366455078
1979	89.0075912475586
1980	90.2514724731445
1981	91.4827728271484
1982	93.4176330566406
1983	93.6744766235352
1984	96.1073989868164
1985	98.168701171875
1986	99.756950378418
1987	100.449867248535
1988	102.300743103027
1989	103.57438659668
1990	104.52214050293
1991	104.737030029297
1992	105.012008666992
1993	142.575134277344
1994	143.308883666992
1995	144.087585449219
1996	144.00553894043
1999	142.884155273438
2000	146.919784545898
2001	155.946166992188
2002	157.648773193359
2003	158.87922668457
2004	151.638092041016
2005	157.343399047852
2006	158.685104370117
2007	159.439895629883
2008	160.468811035156
2009	159.661544799805
2010	160.66047668457
2011	159.349304199219
2012	160.110534667969
2013	161.845886230469
2014	162.421981811523
2015	164.079818725586
2016	160.689270019531
2017	158.670288085938
2018	156.509765625
2019	156.635375976562
2020	151.727508544922
2021	143.163513183594