Year	% gross
1971	84.6306076049805
1972	85.2524337768555
1973	85.427001953125
1974	85.1205062866211
1975	85.9842300415039
1976	88.4517288208008
1977	90.6280899047852
1978	91.0195388793945
1979	91.1221313476562
1980	89.8985290527344
1982	98.2890014648438
1983	96.3476486206055
1984	91.9006576538086
1985	89.827751159668
1986	87.9563293457031
1987	84.8902587890625
1988	83.2227935791016
1989	94.5641784667969
1990	95.0699615478516
1991	91.7422637939453
1992	86.1143112182617
1993	88.1853713989258
1994	93.4324417114258
1995	96.3899536132812
1996	99.6457214355469
1997	89.2599334716797
1998	82.3685836791992
1999	82.902717590332
2000	88.6476898193359
2001	93.2312316894531
2002	94.0546264648438
2003	94.8876266479492
2004	94.8688201904297
2005	95.350471496582
2006	96.8624572753906
2007	97.2269592285156
2008	97.5329284667969
2009	97.3474731445312
2010	98.3169937133789
2011	99.3327789306641
2012	99.6204986572266
2013	106.426498413086
2014	105.802406311035
2015	104.278198242188
2016	102.495468139648
2017	101.687683105469
2018	101.04434967041
2019	99.5519027709961
2020	98.7816925048828
2021	99.574836730957