Year	% gross
1970	14.0710000991821
1971	15.3378000259399
1972	18.3010196685791
1973	19.9883098602295
1974	21.626070022583
1975	22.9836101531982
1976	22.5352096557617
1977	24.2413196563721
1978	27.9176006317139
1979	32.5622291564941
1980	31.638599395752
1981	38.8667984008789
1982	42.2332916259766
1983	45.1687889099121
1984	45.3019104003906
1985	46.6120300292969
1986	50.1042518615723
1987	55.760368347168
1988	55.1138801574707
1989	53.3835792541504
1990	51.2714881896973
1999	37.7117385864258
2000	43.2548484802246
2001	48.3064117431641
2002	53.3070297241211
2003	50.6463508605957
2004	52.1518783569336
2005	59.8346405029297
2006	65.3123931884766
2007	69.3150329589844
2008	67.1387329101563
2009	63.7397918701172
2010	64.6436004638672
2011	62.8885116577148
2012	65.8121109008789
2013	45.6877288818359
2014	46.3543395996094
2015	49.7770195007324
2016	60.5500297546387
2017	61.5143203735352
2018	61.9346504211426
2019	62.0293006896973
2020	26.5383796691895