Year	% gross
1981	101.118949890137
1982	103.654968261719
1983	102.927558898926
1984	103.213012695312
1985	103.041763305664
1986	103.018730163574
1987	102.354927062988
1990	105.232681274414
1991	103.699897766113
1993	103.60327911377
1994	103.991622924805
1995	104.879981994629
1996	103.547813415527
1998	103.561233520508
1999	102.839881896973
2005	101.310600280762
2013	99.0333786010742
2014	99.502082824707
2015	100.287261962891
2016	101.276412963867
2017	101.421997070312
2018	101.19637298584
2019	101.343742370605
2020	100.054336547852
2021	98.0067672729492
2022	96.9851684570312