Year	% gross
1971	12.7911195755005
1976	10.9531698226929
1980	6.52417993545532
1983	8.70761013031006
1993	25.2225894927979
1994	23.0307598114014
1999	22.653959274292
2000	22.06955909729
2001	19.1535701751709
2002	18.6761798858643
2005	18.3817405700684