Year	% gross
1971	114.779228210449
1972	115.945610046387
1973	116.418502807617
1974	116.565910339355
1975	116.790283203125
1976	116.434860229492
1977	115.147361755371
1978	112.134788513184
1979	109.012382507324
1980	107.316261291504
1981	106.849731445312
1982	106.041397094727
1983	106.025718688965
1984	105.867820739746
1985	105.168601989746
1986	104.514068603516
1987	104.552619934082
1988	104.682312011719
1989	104.027633666992
1990	103.402839660645
1991	101.802871704102
1992	100.5576171875
1993	98.8003082275391
1994	97.7043380737305
1995	97.4591217041016
1996	97.2534332275391
1998	95.0594482421875
1999	97.2116394042969
2000	99.1890029907227
2001	100.90641784668
2002	101.921310424805
2003	102.71070098877
2004	100.331642150879
2005	100.73030090332
2006	101.055946350098
2007	100.729278564453
2008	102.480163574219
2009	104.338989257812
2010	105.429222106934
2011	104.602752685547
2012	107.34056854248
2013	106.884666442871
2014	105.045692443848
2015	105.131523132324
2016	104.741012573242
2017	104.807907104492
2018	103.430999755859
2019	102.202606201172
2020	105.128761291504
2021	106.03369140625
2022	101.081039428711