Year	% gross
1981	34.187801361084
1982	34.6392097473145
1986	19.0541191101074
1987	17.6743202209473
1988	16.4896907806396
1989	15.755669593811
1990	14.0965204238892
1991	8.53654003143311
1992	13.0280895233154
1998	13.3959197998047
1999	18.6938304901123
2007	147.244964599609
2008	87.5895919799805
2009	86.6285018920898
2010	85.9536819458008
2011	86.6701126098633
2016	37.3146095275879