Year	% gross
1971	24.6857204437256
1972	26.3895702362061
1973	28.8404006958008
1974	30.6625099182129
1976	32.195240020752
1977	30.9971008300781
1978	33.3393211364746
1979	29.574010848999
1980	28.9906997680664
1981	28.5854091644287
1982	28.0410594940186
1983	28.8419799804688
1984	28.5116691589355
1985	28.0626792907715
1986	27.6915607452393
1987	27.700569152832
1988	28.6492595672607
1989	30.145450592041
1990	32.7452697753906
1991	35.3624496459961
1992	37.2514610290527
1993	42.5122184753418
1994	43.5501518249512
1995	42.9279899597168
1996	43.2333602905273
1998	46.3643608093262
1999	48.5578193664551
2000	49.4933395385742
2001	52.8204307556152
2002	54.0187683105469
2003	56.7435684204102
2004	62.36376953125
2005	67.7708282470703
2006	65.7315673828125
2007	65.1387634277344
2008	61.570671081543
2009	59.7438583374023
2010	59.4803810119629
2011	63.0286407470703
2012	64.9595184326172
2013	67.9343109130859
2014	68.0477828979492
2015	69.9346313476562
2016	69.9965896606445
2017	69.1977310180664
2018	68.9741363525391
2019	69.1097412109375
2020	69.7658996582031
2021	70.9926681518555
2022	70.8403091430664