Year	% gross
1973	4.83627986907959
1974	4.99302005767822
1975	5.32532978057861
1976	8.03553009033203
1977	13.9610500335693
1978	10.8496103286743
1979	10.5304298400879
1980	12.0416097640991
1981	14.8482999801636
1982	14.7691602706909
1983	15.8457899093628
1984	17.0301704406738
1985	18.9989395141602
1986	21.1531791687012
1987	22.5253791809082
1988	24.0144500732422
1989	23.8089599609375
1990	23.0641994476318
1991	23.5099697113037
1992	24.3722496032715
1993	25.1536293029785
1994	25.6484794616699
1995	26.667350769043
1996	27.670970916748
1997	29.0639495849609
1998	40.1918716430664
1999	43.2851982116699
2000	43.3357391357422
2001	43.5244293212891
2002	40.853141784668
2003	40.7563095092773
2004	41.4761810302734
2005	42.6416091918945
2006	44.9410095214844
2007	47.3633995056152
2008	49.4662818908691
2009	52.0036315917969
2010	54.6013717651367
2011	59.2508316040039
2012	66.0166473388672
2013	69.818000793457
2014	72.5839080810547
2015	74.7874603271484
2016	77.8062973022461
2017	79.7844772338867
2018	82.6252212524414
2019	83.1743316650391
2020	83.2457427978516