Year	% gross
1970	36.3953094482422
1971	38.7897796630859
1972	41.6730308532715
1973	44.2066383361816
1974	45.2791404724121
1975	45.6664085388184
1976	46.9275588989258
1977	48.3524513244629
1978	47.9745101928711
1979	46.7906608581543
1980	45.1279792785645
1981	44.4342308044434
1982	43.8532295227051
1983	43.6116790771484
1984	44.464771270752
1985	45.4245491027832
1986	46.4023818969727
1987	47.4828681945801
1988	48.2646102905273
1989	48.5985298156738
1990	49.5404090881348
1991	51.0067481994629
1992	52.4363212585449
1993	53.6930999755859
1994	53.8298301696777
1995	54.4663505554199
1996	55.4640693664551
1997	56.3156318664551
1998	56.6040000915527
1999	56.756721496582
2000	57.7659797668457
2001	58.8890113830566
2002	60.9593887329102
2003	61.3981399536133
2004	62.7840995788574
2005	63.6834487915039
2006	64.1228637695312
2007	66.1872406005859
2008	67.7175979614258
2009	68.5960006713867
2010	70.7716522216797
2011	72.2880020141602
2012	73.2177810668945
2013	74.2704391479492
2014	75.1589431762695
2015	75.3493499755859
2016	75.5420227050781
2017	75.2157821655273
2018	75.916618347168
2019	76.3386917114258
2020	77.4229888916016
2021	78.7146987915039
2022	78.7356796264648