Year	% gross
1971	54.262321472168
1972	52.3917198181152
1973	53.4986686706543
1974	53.2532615661621
1975	53.2727394104004
1976	57.1604385375977
1977	58.5382995605469
1978	59.3618087768555
1979	61.2168388366699
1980	62.7912788391113
1981	64.9727325439453
1982	65.7450180053711
1983	64.2859497070312
1984	61.3203315734863
1985	60.6706886291504
1987	55.7667694091797
1988	55.7188186645508
1989	57.9728202819824
1990	56.1710586547852
1991	62.9887886047363
1992	64.3041763305664
1993	64.5169067382812
1994	66.3687515258789
1995	66.3284912109375
1999	70.9945297241211
2000	76.1206588745117
2001	72.6242065429688
2002	76.2311401367188
2003	74.1315536499023
2004	77.7773132324219
2005	84.9130477905273
2006	90.2621688842773
2007	94.787712097168
2008	99.3738632202148
2009	97.4125213623047
2011	97.6544189453125
2012	100.335136413574
2013	99.2810211181641
2014	97.6080627441406
2015	101.002502441406
2016	100.070106506348
2017	98.6025085449219
2018	96.9827117919922
2019	98.1219635009766
2020	96.7912521362305
2021	97.7701187133789
2022	95.2042388916016