Year	% gross
1971	2.04422998428345
1972	2.18042993545532
1973	2.24657011032104
1974	4.0741400718689
1975	8.70561981201172
1976	16.8055305480957
1977	19.9158706665039
1978	21.5113391876221
1982	15.5530195236206
1983	13.5027704238892
1984	15.0197200775146
1985	5.05693006515503
1986	6.65074014663696
1987	7.26035022735596
1988	8.10375022888184
1989	9.5376501083374
1990	11.203519821167
1991	11.6093397140503
1992	12.7850303649902
1993	8.70942974090576
1994	6.91725015640259
1995	7.57231998443604
1997	11.5638399124146
1998	15.5127296447754
1999	15.2665100097656
2000	18.8244590759277
2001	22.8382301330566
2002	27.9402103424072
2003	35.9194107055664
2004	39.9557991027832
2005	46.6925086975098
2006	52.3852806091309
2007	53.737850189209
2008	49.1977310180664
2009	42.8534317016602
2010	41.4697418212891
2011	42.492431640625
2012	35.2668304443359
2013	38.8276481628418
2014	43.4552993774414
2015	52.6112785339355
2016	54.7159690856934
2017	62.9553604125977
2018	69.2683868408203
2019	74.9068984985352
2020	73.6952896118164