Year	% gross
1971	67.0687713623047
1972	64.5948867797852
1973	66.5990219116211
1974	69.397087097168
1975	73.6905212402344
1976	75.4512023925781
1977	75.025032043457
1978	74.7304229736328
1979	74.0665664672852
1980	77.5712814331055
1981	77.4324569702148
1982	74.7240982055664
1983	73.681266784668
1984	72.046012878418
1985	70.6949462890625
1986	68.2214736938477
1987	68.1640472412109
1988	69.9652862548828
1989	71.962028503418
1990	69.1996231079102
1991	68.0923233032227
1992	58.807300567627
1993	60.2426681518555
1994	57.4663314819336
1995	59.8504104614258
1996	64.7886962890625
1997	66.0026168823242
1998	63.3280487060547
1999	67.6532135009766
2000	69.8386688232422
2001	69.6217269897461
2002	73.3535614013672
2003	77.7743988037109
2004	81.1197509765625
2005	84.013801574707
2006	86.6035766601563
2007	84.5327301025391
2008	81.6238403320313
2009	80.0744094848633
2010	79.9782333374023
2011	80.2359771728516
2012	79.2135162353516
2013	79.287712097168
2014	79.4550704956055
2015	79.305419921875
2016	76.6469192504883
2017	76.2920532226563
2018	78.9722213745117
2019	82.319709777832
2020	83.8470077514648