Year	% gross
1971	6.44469022750854
1972	7.76782989501953
1973	8.70106983184814
1974	10.1923303604126
1975	12.8196601867676
1976	16.6261405944824
1977	20.4291305541992
1978	23.5553894042969
1979	27.1425495147705
1980	29.6381607055664
1982	28.2235507965088
1983	24.8452701568604
1984	20.4881896972656
1985	17.651969909668
1986	18.1477108001709
1987	17.7696990966797
1988	20.0908908843994
1989	18.5449504852295
1990	20.7403907775879
1991	19.7211399078369
1992	19.4517993927002
1994	20.6866493225098
1995	22.4389190673828
1996	23.8327693939209
1997	24.2069301605225
1999	29.8826198577881
2000	32.4820518493652
2001	35.3544082641602
2002	39.4723281860352
2003	41.6094207763672
2004	43.0118408203125
2005	45.3081092834473
2006	47.1379013061523
2007	43.7538795471191
2011	53.6932907104492
2017	61.2385215759277
2021	64.290901184082