Year	% gross
1971	4.85177993774414
1972	5.2934398651123
1973	5.00691986083984
1976	5.9648699760437
1981	4.97819995880127
1987	4.70060014724731
1988	4.62479019165039
1991	5.78305006027222
2003	1.68089997768402
2005	3.26188993453979
2006	3.21865010261536
2007	3.15002989768982
2008	3.8381199836731
2009	4.16632986068726
2010	5
2011	5.08724021911621
2017	2.92554998397827