Year	% gross
1971	0.131760001182556
1974	0.319180011749268
1975	0.416079998016357
1976	0.493690013885498
1977	0.595099985599518
1978	0.692229986190796
1979	0.774339973926544
1980	0.83950001001358
1982	0.688470005989075
1983	0.868900001049042
1984	1.04736995697021
1985	1.06594002246857
1986	0.959640026092529
1987	0.772800028324127
1989	0.614340007305145
1990	0.628009974956512
1991	0.608110010623932
1992	0.775300025939941
1993	0.898810029029846
1995	0.921869993209839
1996	1.03647005558014
1997	1.42850995063782
1998	1.39528000354767
1999	1.80509996414185
2000	1.83404004573822
2001	1.95004999637604
2002	1.9438099861145
2008	4.91656017303467
2009	5.44737005233765
2010	5.67311000823975
2011	5.12092018127441
2012	6.61513996124268
2013	6.12579011917114
2014	5.70353984832764
2015	5.28096008300781
2016	3.65100002288818
2017	4.16499996185303
2018	4.96700000762939
2019	4.73400020599365