Year	% gross
1970	54.7651901245117
1973	51.7771415710449
1975	64.7367706298828
1976	65.1645889282227
1977	67.5154190063477
1978	68.7373809814453
1979	70.0213012695312
1980	73.5653991699219
1981	72.7134628295898
1982	77.5508422851562
1986	77.2320175170898
1994	74.0636291503906
1995	75.5583190917969
1996	73.7610015869141
1997	77.0815582275391
1998	76.8313598632812
1999	77.8549423217773
2000	77.4985733032227
2001	78.7819595336914
2002	79.4139404296875
2003	80.8134078979492
2004	80.4250717163086
2005	79.6430816650391
2006	79.2835464477539
2007	78.1225128173828
2009	78.8373870849609
2010	80.7316131591797
2011	79.9401397705078
2012	80.2511367797852
2014	84.4574203491211
2015	84.0876007080078
2016	84.4522476196289