Year	% gross
1970	24.5902500152588
1971	24.548210144043
1972	24.9141807556152
1973	25.371129989624
1974	25.6990604400635
1975	26.2905597686768
1976	27.0534191131592
1977	27.5415706634521
1978	27.8477993011475
1979	27.7431297302246
1980	27.8667907714844
1981	27.9633293151855
1982	28.2618007659912
1983	28.7317008972168
1984	29.2272491455078
1985	29.911319732666
1986	30.2965698242188
1987	30.3991508483887
1988	30.7546501159668
1989	31.2857799530029
1990	31.9299297332764
1991	32.8000106811523
1992	33.4747581481934
1993	34.5236015319824
1994	36.0311584472656
1995	37.0401306152344
1996	38.392219543457
1997	40.0437393188477
1998	41.0953407287598
1999	43.0086898803711
2000	44.8055992126465
2001	47.2877998352051
2002	49.9136581420898
2003	52.4984893798828
2004	53.8162498474121
2005	55.5473098754883
2006	57.1243591308594
2007	58.3083801269531
2008	59.1727714538574
2009	60.3683891296387
2010	61.9667587280273
2011	63.0290412902832
2012	63.8057289123535
2013	64.9157562255859
2014	66.4646301269531
2015	67.6950302124023
2016	69.1541900634766
2017	70.8204727172852
2018	72.4661712646484
2019	74.167839050293
2020	75.6946792602539
2021	78.6139984130859
2022	78.802978515625