Year	% gross
1971	0.177029997110367
1972	0.192430004477501
1973	0.150020003318787
1974	0.242300003767014
1977	0.25152000784874
1978	0.387800008058548
1979	0.466190010309219
1980	0.512430012226105
1981	0.483920007944107
1982	0.474519997835159
1983	0.489160001277924
1984	0.469619989395142
1986	0.74575001001358
1987	0.795910000801086
1988	0.743350028991699
1989	0.763040006160736
1990	0.791890025138855
1991	0.780539989471436
1994	0.610119998455048
1995	0.669390022754669
1996	0.694540023803711
1997	0.809069991111755
1998	0.843020021915436
1999	0.933220028877258
2000	1.16600000858307
2001	1.46114003658295
2002	1.65718996524811
2003	2.35127997398376
2004	2.65906000137329
2005	2.85401010513306
2008	3.42407989501953
2009	4.96265983581543
2010	6.83386993408203
2011	7.17573022842407
2012	7.59986019134521
2013	8.04500007629395
2014	7.73872995376587
2015	9.2790002822876
2016	9.98999977111816
2017	10.3640003204346
2018	10.3819999694824