Year	% gross
1971	75.7177886962891
1972	73.5215606689453
1973	73.652473449707
1974	74.452766418457
1975	76.2377395629883
1976	78.020378112793
1977	79.2947387695312
1978	80.9480361938477
1979	82.7689590454102
1980	83.8028335571289
1981	85.050537109375
1982	85.7733764648438
1983	86.0589981079102
1984	85.8523483276367
1985	86.4584884643555
1986	86.6804809570312
1987	86.1047515869141
1988	86.3604583740234
1989	86.177619934082
1990	85.996940612793
1991	85.2370834350586
1992	83.7510604858398
1994	91.0889282226562
1995	93.2317810058594
1996	95.7816925048828
1997	98.0909729003906
1998	92.9815979003906
1999	94.4410400390625
2000	96.037727355957
2001	98.1953125
2002	99.8333282470703
2003	101.849853515625
2004	95.9433975219727
2005	97.3726425170898
2006	97.7545013427734
2007	97.855339050293
2008	98.3791732788086
2009	99.742073059082
2010	101.995498657227
2011	103.079391479492
2012	101.231918334961
2013	107.068168640137
2014	105.839767456055
2015	104.545822143555
2016	104.046890258789
2017	104.290512084961
2018	103.748878479004
2019	102.55980682373
2020	101.990699768066
2021	99.6919326782227