Year	% gross
1971	98.7155838012695
1972	98.4433135986328
1974	104.058631896973
1975	102.46524810791
1976	104.178062438965
1977	109.788543701172
1978	110.017463684082
1979	117.355987548828
1980	120.188697814941
1981	121.333381652832
1982	121.47940826416
1983	120.263160705566
1984	120.209381103516
1985	118.956176757812
1986	118.065139770508
1987	116.937797546387
1988	115.139572143555
1989	114.658271789551
1990	113.27498626709
1991	112.534378051758
1992	111.829521179199
1993	111.348289489746
1994	110.746726989746
1995	111.043640136719
1996	110.475288391113
1997	109.73193359375
1998	108.87964630127
1999	108.550262451172
2000	107.822311401367
2001	107.941589355469
2002	108.262351989746
2003	108.363471984863
2004	107.988586425781
2005	107.58846282959
2006	107.136100769043
2007	107.784126281738
2008	108.5234375
2009	109.854042053223
2010	110.223320007324
2011	110.343360900879
2012	110.465309143066
2013	109.525497436523
2014	108.065948486328
2015	106.55207824707
2016	106.081642150879
2017	105.642036437988
2018	105.052146911621
2019	105.078788757324
2020	104.506576538086
2021	103.379371643066
2022	102.090393066406