Year	% gross
1970	22.8810691833496
1971	23.1627407073975
1972	23.6306800842285
1973	24.0470695495605
1974	24.1217498779297
1975	24.5165691375732
1976	24.6846199035645
1977	25.3976097106934
1978	26.0782108306885
1979	26.6531391143799
1980	27.9172897338867
1981	28.1005306243896
1982	29.1523895263672
1983	30.8867092132568
1984	31.8621006011963
1985	31.7453994750977
1986	30.6333999633789
1987	31.0832500457764
1988	30.9975490570068
1989	30.6601390838623
1990	30.3975505828857
1991	31.2849197387695
1992	31.9217891693115
1993	31.9125995635986
1994	32.1426200866699
1995	32.4122009277344
1996	32.405891418457
1997	32.4551887512207
1998	32.8597183227539
1999	33.0615615844727
2000	33.7306213378906
2001	34.7708702087402
2002	35.7174911499023
2003	36.6198310852051
2004	38.0762214660645
2005	38.3688812255859
2006	40.0569686889648
2007	41.0863304138184
2008	42.1503105163574
2009	43.6665802001953
2010	45.1364212036133
2011	46.0175590515137
2012	47.0170783996582
2013	48.6538887023926
2014	47.8022193908691
2015	48.2992515563965
2016	48.7143402099609
2017	48.3454399108887
2018	49.0738410949707
2019	49.4804191589355
2020	49.676139831543
2021	49.6900596618652
2022	49.4835090637207