Year	% gross
1970	34.7961082458496
1971	35.0340003967285
1972	37.371898651123
1973	38.8401489257812
1974	40.2749481201172
1975	42.867000579834
1976	45.1234893798828
1977	47.2928504943848
1978	49.1040496826172
1979	50.1860198974609
1980	51.1600914001465
1981	51.7004089355469
1982	52.8138999938965
1983	53.4831314086914
1984	54.3670883178711
1985	55.4509010314941
1986	57.7339706420898
1987	58.9577217102051
1988	59.5232200622559
1989	60.6578216552734
1990	63.4798583984375
1991	63.4557800292969
1992	62.6894111633301
1993	64.0527725219727
1994	66.8151702880859
1995	66.5590972900391
1996	66.4752502441406
1997	67.4757308959961
1998	68.7523880004883
1999	70.0392074584961
2000	71.1424026489258
2001	72.281852722168
2002	73.1478424072266
2003	73.9910583496094
2004	74.7788772583008
2005	74.2392807006836
2006	74.0580062866211
2007	72.2190628051758
2008	73.2646331787109
2009	74.8591690063477
2010	75.5222930908203
2011	78.4910125732422
2012	79.2391510009766
2013	76.975959777832
2014	77.1152420043945
2015	77.4691314697266
2016	77.6086196899414
2017	77.9364318847656
2018	78.0707473754883
2019	78.5642700195312
2020	79.0360870361328
2021	79.8347930908203
2022	80.168586730957