Year	% gross
1971	111.971260070801
1972	110.667297363281
1973	110.91960144043
1974	106.834182739258
1975	109.309028625488
1976	109.610900878906
1977	110.347969055176
1978	109.328750610352
1979	108.035011291504
1980	107.56063079834
1981	107.160469055176
1982	106.750228881836
1983	106.065559387207
1984	106.064849853516
1985	104.866302490234
1986	105.149459838867
1987	105.305732727051
1988	105.779090881348
1989	106.095458984375
1990	106.352058410645
1991	106.455047607422
1992	106.315147399902
1993	106.266143798828
1994	106.412261962891
1995	101.568168640137
1996	101.661071777344
1997	101.360961914062
1998	101.538589477539
1999	101.658432006836
2000	101.411880493164
2001	101.354629516602
2002	102.393867492676
2003	102.737510681152
2004	103.168251037598
2005	103.170623779297
2006	103.328758239746
2007	105.135383605957
2008	104.953300476074
2009	104.936752319336
2010	105.199279785156
2011	105.054992675781
2012	105.482597351074
2013	105.631080627441
2014	105.31275177002
2015	101.619422912598
2016	101.132469177246
2017	100.666999816895
2018	100.464347839355
2019	100.275161743164
2020	99.9861373901367
2021	100.069267272949
2022	99.2228622436523