Year	% gross
1971	65.7389526367188
1972	63.5298118591309
1973	65.7296295166016
1974	69.8760299682617
1975	73.0938491821289
1976	75.1119079589844
1977	74.7954330444336
1978	74.4183197021484
1979	75.0752563476563
1980	77.5650329589844
1981	77.7198486328125
1982	74.929313659668
1983	74.1823806762695
1984	72.3444213867188
1985	71.1533584594727
1986	68.5812225341797
1987	68.4977493286133
1988	70.188346862793
1989	72.093132019043
1990	68.9730911254883
1991	67.7589569091797
1992	58.7490081787109
1993	60.4925384521484
1994	57.9554290771484
1995	60.3385810852051
1996	65.2496109008789
1997	66.9624176025391
1998	63.7515983581543
1999	67.9579772949219
2000	69.886833190918
2001	69.8974075317383
2002	73.5943832397461
2003	78.3642578125
2004	81.6978530883789
2005	84.4738006591797
2006	86.89111328125
2007	85.0392990112305
2008	82.0812606811523
2009	80.3638916015625
2010	80.4212265014648
2011	80.5513305664063
2012	79.6154937744141
2013	79.6129379272461
2014	79.7001724243164
2015	79.7496337890625
2016	77.2057800292969
2017	76.9631805419922
2018	79.3531112670898
2019	82.7284088134766
2020	84.2854766845703