Year	% gross
1970	103.558128356934
1971	105.279899597168
1972	104.965187072754
1973	106.686683654785
1974	107.535537719727
1975	106.937728881836
1976	106.858879089355
1977	109.93440246582
1978	111.575088500977
1979	115.596809387207
1980	116.41780090332
1981	116.173851013184
1982	117.081886291504
1983	115.752967834473
1984	117.771339416504
1985	117.070487976074
1986	115.949729919434
1987	115.283241271973
1988	116.848686218262
1989	114.495399475098
1990	117.300849914551
1991	113.433746337891
1992	114.156593322754
1993	114.342872619629
1994	114.788383483887
1995	115.548721313477
1996	116.659683227539
1997	116.09610748291
1998	118.380218505859
1999	119.53443145752
2000	118.58748626709
2001	117.939270019531
2002	117.890548706055
2003	116.849182128906
2004	116.788597106934
2005	115.923606872559
2006	113.421768188477
2007	115.263519287109
2008	115.039901733398
2009	115.348052978516
2010	107.80396270752
2011	106.98706817627
2012	107.249900817871
2013	108.067886352539
2014	107.054290771484
2015	106.160850524902
2016	105.71305847168
2017	105.435913085938
2018	105.082206726074
2019	104.633270263672
2020	103.492248535156
2021	102.712249755859
2022	103.162162780762