Year	% gross
1970	85.1059722900391
1971	85.0884628295898
1972	86.290153503418
1973	86.1338500976562
1974	86.4558792114258
1975	85.6921691894531
1976	85.2757415771484
1977	85.1289978027344
1978	84.5724563598633
1979	84.0781402587891
1980	87.3321685791016
1981	87.2639312744141
1982	88.509033203125
1983	88.9139785766602
1984	89.7361373901367
1985	89.7405624389648
1986	90.8247528076172
1987	91.4115982055664
1988	91.8260803222656
1989	92.3612518310547
1990	92.767936706543
1991	93.2382507324219
1992	93.9046096801758
1993	96.1223297119141
1994	98.4222030639648
1995	98.237678527832
1996	98.8157501220703
1997	98.7304000854492
1998	97.5865783691406
1999	98.2028579711914
2000	98.6478729248047
2001	99.2956008911133
2002	99.952880859375
2003	100.206520080566
2004	99.5843734741211
2005	100.489608764648
2006	100.373168945312
2007	100.364646911621
2008	100.824340820312
2009	101.449371337891
2010	102.21312713623
2011	102.007827758789
2012	101.884117126465
2013	104.637588500977
2014	104.679809570312
2015	105.193450927734
2016	105.231986999512
2017	105.683113098145
2018	105.212409973145
2019	105.654899597168
2020	105.483726501465
2021	104.970092773438
2022	104.867286682129