Year	% gross
1970	26.1666698455811
1971	27.9523105621338
1972	30.1241493225098
1973	32.0474891662598
1974	33.2053184509277
1975	33.8078308105469
1976	34.728588104248
1977	35.909049987793
1978	36.2446708679199
1979	35.1615905761719
1980	33.482551574707
1981	32.5864181518555
1982	31.973819732666
1983	32.4228591918945
1984	32.6050300598145
1985	33.7686080932617
1986	34.9477806091309
1987	36.3646011352539
1988	37.2625007629395
1989	37.911750793457
1990	38.851490020752
1991	40.3913192749023
1992	41.9948883056641
1993	43.3819999694824
1994	44.5287017822266
1995	45.6383514404297
1996	47.0392303466797
1997	48.4766082763672
1998	49.6364288330078
1999	50.6246910095215
2000	51.9314002990723
2001	53.3577919006348
2002	55.9202995300293
2003	57.4202690124512
2004	58.8638687133789
2005	60.2794609069824
2006	61.0785789489746
2007	63.5564193725586
2008	65.5913772583008
2009	67.290641784668
2010	68.9580307006836
2011	70.676872253418
2012	71.8619995117188
2013	73.8922729492188
2014	75.1665725708008
2015	75.2382888793945
2016	75.6119613647461
2017	75.17431640625
2018	76.1189270019531
2019	76.7075729370117
2020	77.4042892456055
2021	78.1722183227539
2022	78.8708724975586