Year	% gross
1970	10.9550504684448
1971	11.0276203155518
1972	11.3055095672607
1973	11.6067800521851
1974	11.7527103424072
1975	12.0526504516602
1976	12.3558101654053
1977	12.6590995788574
1978	13.2662496566772
1979	13.8163299560547
1980	14.5777502059937
1981	15.588529586792
1982	16.7520294189453
1983	17.1415901184082
1984	17.6744804382324
1985	19.1183795928955
1986	19.9211597442627
1987	20.2283191680908
1988	20.052209854126
1989	19.4553394317627
1990	19.8275699615479
1991	20.1805191040039
1992	20.1309509277344
1993	20.2992305755615
1994	20.6093006134033
1995	21.3549098968506
1996	21.6536293029785
1997	21.7216300964355
1998	22.2144603729248
1999	22.4783191680908
2000	22.742259979248
2001	23.8097496032715
2002	24.3388805389404
2003	25.424690246582
2004	26.7039699554443
2005	27.6277694702148
2006	28.5023307800293
2007	29.1442604064941
2008	31.2621402740479
2009	33.1188812255859
2010	35.078441619873
2011	36.3035202026367
2012	37.9106788635254
2013	40.6532707214355
2014	39.575080871582
2015	40.2068099975586
2016	39.9117813110352
2017	40.3929405212402
2018	40.7666206359863
2019	41.3680114746094
2020	42.1397399902344
2021	42.5586090087891
2022	42.4713096618652