Year	% gross
1970	58.2860717773438
1971	58.7222518920898
1972	59.3780403137207
1973	61.0914497375488
1974	63.1010589599609
1975	64.503776550293
1976	65.7388229370117
1977	66.7903594970703
1978	67.5943984985352
1979	68.4614334106445
1980	69.593620300293
1981	70.4671783447266
1982	70.6427230834961
1983	71.0906219482422
1984	71.7132415771484
1985	72.4513626098633
1986	73.2667922973633
1987	73.4892120361328
1988	73.7527694702148
1989	74.070671081543
1990	74.8349990844727
1991	74.9490814208984
1992	74.4456405639648
1993	75.0815277099609
1994	75.8666915893555
1995	76.5506820678711
1996	78.67822265625
1997	80.35888671875
1998	81.6211090087891
1999	83.0258026123047
2000	84.1771392822266
2001	85.1665267944336
2002	86.3412704467773
2003	87.4291381835938
2004	87.0428009033203
2005	89.7812423706055
2006	90.4573287963867
2007	90.9515380859375
2008	91.775520324707
2009	92.1153106689453
2010	93.1059036254883
2011	94.0193099975586
2012	94.3164215087891
2013	94.5267105102539
2014	94.8420028686523
2015	96.2352523803711
2016	97.3359222412109
2017	96.9148483276367
2018	98.2814483642578
2019	99.808219909668
2020	100.621337890625