Year	% gross
1970	34.9519500732422
1971	32.395378112793
1972	33.2274513244629
1973	34.1698913574219
1974	35.144229888916
1975	35.6370506286621
1976	36.4797210693359
1977	37.3708305358887
1978	37.5032615661621
1979	37.614631652832
1980	37.750659942627
1981	38.0766716003418
1982	38.4947700500488
1983	39.3876800537109
1984	39.894588470459
1985	40.4865684509277
1986	40.6083908081055
1987	40.552619934082
1988	40.6548118591309
1989	41.1282806396484
1990	42.6432304382324
1991	43.803768157959
1992	44.5802688598633
1993	45.6460914611816
1994	46.4199714660645
1995	47.6998405456543
1996	48.4286918640137
1997	49.4687385559082
1998	50.7222290039062
1999	50.1367683410645
2000	51.8909912109375
2001	52.9049491882324
2002	54.185661315918
2003	55.3043594360352
2004	56.7703590393066
2005	57.9643287658691
2006	59.2477188110352
2007	60.6275787353516
2008	61.3137512207031
2009	62.7829093933105
2010	63.860408782959
2011	64.3891220092773
2012	65.7130584716797
2013	66.5140075683594
2014	67.5400009155273
2015	68.3738327026367
2016	69.2077407836914
2017	70.2364807128906
2018	70.9990463256836
2019	71.7284164428711
2020	72.1296310424805
2021	72.3462677001953
2022	72.5250930786133