Year	% gross
1970	98.7084503173828
1971	96.9350509643555
1972	96.0762176513672
1973	97.7940292358398
1974	97.3848724365234
1975	100.031463623047
1976	102.081916809082
1977	102.498817443848
1978	100.516052246094
1979	100.823280334473
1980	101.300918579102
1981	102.288352966309
1982	103.094833374023
1983	104.475486755371
1984	106.153251647949
1985	107.966316223145
1986	109.633453369141
1987	109.486801147461
1988	109.190521240234
1989	108.644287109375
1990	106.95987701416
1991	105.432563781738
1992	104.441078186035
1993	104.338363647461
1994	104.487998962402
1995	104.341423034668
1996	104.310546875
1997	104.146118164062
1998	104.208297729492
1999	105.11254119873
2000	105.776962280273
2001	106.022872924805
2002	105.602577209473
2003	107.152290344238
2004	107.272132873535
2005	106.940162658691
2006	106.600570678711
2007	107.780349731445
2008	108.010131835938
2009	107.573371887207
2010	106.27921295166
2011	105.84748840332
2012	106.558799743652
2013	107.270080566406
2014	105.069549560547
2015	104.839492797852
2016	106.418800354004
2017	105.591796875
2018	100.469566345215
2019	100.114097595215
2020	100.76335144043
2021	101.196952819824
2022	103.735008239746