Year	% gross
1971	81.5673294067383
1974	97.2719421386719
1981	116.358551025391
1982	112.026832580566
1983	120.154747009277
1984	137.501678466797
1993	109.487678527832
1994	107.101852416992
1999	88.0031890869141
2000	83.407600402832
2001	84.3494110107422
2002	80.5801696777344
2003	73.1898727416992
2005	71.3268203735352
2008	60.8636589050293
2009	61.2192306518555
2010	62.4828300476074
2011	62.6617584228516
2012	64.0161666870117
2015	52.786979675293
2016	53.5359992980957
2017	53.375
2018	51.2330017089844
2019	51.1990013122559