Year	% gross
1970	1.37592995166779
1972	1.74959003925323
1973	1.95945000648499
1974	1.86813998222351
1975	2.02974009513855
1976	2.29095005989075
1977	2.34541988372803
1978	3.06008005142212
1979	3.39678001403809
1986	4.11581993103027
1990	3.41837000846863
2003	2.15839004516602
2004	2.17154002189636
2009	6.4633002281189
2011	5.5667200088501
2014	12.9775295257568
2018	14.73108959198
2020	15.5831298828125