Year	% gross
1970	103.113632202148
1971	105.023147583008
1972	104.721939086914
1973	106.275756835938
1974	106.924957275391
1975	106.291000366211
1976	106.302879333496
1977	109.338333129883
1978	111.104782104492
1979	114.914451599121
1980	115.728858947754
1981	115.671188354492
1982	116.396347045898
1983	114.997688293457
1984	116.541938781738
1985	115.939903259277
1986	114.851676940918
1987	114.182929992676
1988	115.574806213379
1989	113.474838256836
1990	116.109230041504
1991	112.732238769531
1992	113.359397888184
1993	113.466377258301
1994	113.737426757812
1995	114.306869506836
1996	115.141510009766
1997	113.764373779297
1998	116.862266540527
1999	117.910942077637
2000	117.005340576172
2001	116.56120300293
2002	116.649620056152
2003	115.604843139648
2004	115.653411865234
2005	114.832138061523
2006	112.53874206543
2007	114.336990356445
2008	113.980369567871
2009	114.220359802246
2010	107.287010192871
2011	106.538131713867
2012	106.772018432617
2013	107.520538330078
2014	106.470008850098
2015	105.555198669434
2016	104.940292358398
2017	104.528923034668
2018	104.364112854004
2019	104.086311340332
2020	103.170623779297
2021	102.655662536621
2022	103.226249694824