Year	% gross
1970	7.4177098274231
1971	7.37342977523804
1972	7.8638801574707
1973	8.50977039337158
1974	9.06472015380859
1975	9.85597038269043
1976	10.8070201873779
1977	11.92626953125
1978	12.4900102615356
1979	12.5188703536987
1980	13.0867395401001
1981	13.8363800048828
1982	14.2580099105835
1983	14.4994802474976
1984	14.9347696304321
1985	14.8125495910645
1986	15.4631996154785
1987	15.7325801849365
1988	15.5897102355957
1989	15.1709899902344
1990	15.082200050354
1991	14.6565399169922
1992	15.4041996002197
1993	16.3342800140381
1994	17.0092391967773
1995	17.8907108306885
1996	19.2875308990479
1997	20.0223693847656
1998	20.5941104888916
1999	21.5076599121094
2000	21.3771800994873
2001	21.5592002868652
2002	21.6042194366455
2003	21.2276401519775
2004	22.6563091278076
2005	23.4961204528809
2006	24.0956592559814
2007	25.9120292663574
2008	27.0835704803467
2009	28.2250595092773
2010	30.1028308868408
2011	30.048770904541
2012	31.8204097747803
2013	33.4578704833984
2014	36.0429306030273
2015	38.4878311157227
2016	37.2616195678711
2017	37.685359954834
2018	37.5310401916504
2019	37.5997581481934
2020	37.6245918273926
2021	37.5107803344727
2022	37.3423194885254