Year	% gross
1970	98.9168930053711
1971	101.026229858398
1972	101.757583618164
1973	101.873878479004
1974	101.739036560059
1975	100.156616210938
1976	97.4248504638672
1977	98.4059829711914
1978	100.098876953125
1979	99.5311737060547
1980	96.5700531005859
1981	98.1256866455078
1982	98.2917861938477
1983	98.2687911987305
1984	97.4538421630859
1985	97.8564224243164
1986	100.853828430176
1987	98.831657409668
1988	98.6075592041016
1989	101.793487548828
1991	106.752342224121
1992	106.225257873535
1993	108.114318847656
1994	111.172180175781
1995	109.614112854004
1996	109.285873413086
1997	108.565376281738
1998	107.128707885742
1999	109.312049865723
2000	108.790023803711
2001	104.041687011719
2002	101.188217163086
2003	97.6507034301758
2004	93.4228515625
2005	97.8316268920898
2006	97.4392471313477
2007	99.7748794555664
2008	101.45027923584
2009	103.281440734863
2010	103.770202636719
2011	103.796112060547
2012	102.328590393066
2013	101.460792541504
2014	100.559173583984
2015	99.7000274658203
2016	97.2468109130859
2017	96.1076278686523
2018	96.9830322265625
2019	96.0979080200195
2020	97.0702285766602
2021	96.5140075683594
2022	97.6453704833984