Year	% gross
1970	46.4395713806152
1971	46.6057090759277
1972	47.0507507324219
1973	49.0711517333984
1974	51.265251159668
1975	53.6224517822266
1976	55.3113784790039
1977	55.4617004394531
1978	55.1382484436035
1979	55.5455017089844
1980	56.3157081604004
1981	58.1163101196289
1982	58.5424003601074
1983	59.3427200317383
1984	60.7014617919922
1985	61.6126403808594
1986	63.2611389160156
1987	64.0279006958008
1988	64.5715789794922
1989	63.7570114135742
1990	64.9261779785156
1991	66.2293319702148
1992	66.6196594238281
1993	67.8080825805664
1994	68.9098892211914
1995	69.5386428833008
1996	70.6693801879883
1997	70.4373168945313
1998	72.2083511352539
1999	72.0850372314453
2000	71.6083068847656
2001	73.0477523803711
2002	74.5976715087891
2003	75.2013168334961
2004	75.1944427490234
2005	78.24072265625
2006	75.3777923583984
2007	75.393440246582
2008	75.5710678100586
2009	75.7178192138672
2010	77.3448181152344
2011	78.9979705810547
2012	80.2255935668945
2013	80.6807479858398
2014	78.7340774536133
2015	82.2478332519531
2016	82.9848937988281
2017	82.8842926025391
2018	82.819206237793
2019	83.9358825683594
2020	83.8173828125