Year	% gross
1979	1.13908994197845
1980	1.72862005233765
1981	1.45508003234863
1982	2.08766007423401
1983	1.84694004058838
1984	1.95394003391266
1986	2.07617998123169
1988	2.03351998329163
1990	2.37497997283936
1991	2.63713002204895
1992	2.41875004768372
1999	3.26556992530823
2000	3.15013003349304
2006	1.66651999950409
2008	3.21411991119385
2009	3.26149010658264
2010	3.70270991325378
2012	3.94918990135193