Year	% gross
1970	104.998893737793
1971	105.121032714844
1972	104.622100830078
1973	103.545448303223
1974	104.054718017578
1975	103.179580688477
1976	102.376411437988
1977	101.75390625
1978	100.913940429688
1979	99.7857513427734
1980	98.1508712768555
1981	96.8411865234375
1982	97.499870300293
1983	97.6757965087891
1984	97.6377410888672
1985	97.7455520629883
1986	97.7979278564453
1987	98.5868072509766
1988	98.3968734741211
1989	97.8764190673828
1990	96.3513107299805
1991	95.127197265625
1992	95.8777389526367
1993	96.0333709716797
1994	96.4500274658203
1995	96.6379699707031
1996	97.8987884521484
1997	98.8611831665039
1998	100.352561950684
1999	100.464141845703
2000	100.954132080078
2001	101.657867431641
2002	101.874290466309
2003	101.592872619629
2004	101.734176635742
2005	101.094818115234
2006	100.647598266602
2007	99.8711395263672
2008	98.9667510986328
2009	99.1034164428711
2010	99.2044525146484
2011	99.1384506225586
2012	99.4559631347656
2013	98.3629302978516
2014	97.5766983032227
2015	95.6165618896484
2016	95.9258499145508
2017	95.5607070922852
2018	94.7267074584961
2019	95.1334381103516
2020	89.4990997314453
2021	95.399528503418
2022	95.3861389160156