Year	% gross
1975	16.6713409423828
1976	28.2396793365479
1977	24.075159072876
1978	31.5474395751953
1979	27.7456607818604
1984	22.5817203521729
2000	55.3825302124023
2007	82.7266235351563
2008	84.7787017822266
2010	93.6963806152344
2011	92.0347290039063
2012	95.8641128540039
2013	93.5495529174805
2014	92.7459335327148
2016	74.8569412231445
2017	72.6540603637695
2018	70.2536010742188