Year	% gross
1971	2.06005001068115
1972	2.3620400428772
1973	2.91380000114441
1974	3.514240026474
1975	3.95271992683411
1976	4.80502986907959
1977	6.62700986862183
1978	7.0327000617981
1979	8.70635986328125
1980	12.9457998275757
1981	15.7839002609253
1982	16.2604694366455
1983	17.4745292663574
1984	19.1982803344727
1985	17.9640502929688
1986	17.2896900177002
1987	19.7453498840332
1988	18.3861904144287
1989	20.2598094940186
1990	21.0786895751953
1991	21.7228603363037
1992	21.5590991973877
1993	21.7250308990479
1994	19.6777801513672
1996	20.4309101104736
1997	23.301290512085
2000	31.0193405151367
2002	32.5370292663574
2003	37.9571113586426
2004	42.6895217895508
2005	41.2887916564941
2006	41.5715484619141
2007	38.9455986022949
2008	41.8823204040527
2009	42.8630409240723
2010	39.6320991516113
2011	39.8821411132812
2012	46.9674186706543
2015	36.6028785705566
2016	34.3474998474121
2017	31.5482597351074
2018	36.1511497497559
2019	34.9571189880371
2020	36.4723587036133
2021	38.2594299316406
2022	41.3306617736816