Year	% gross
1971	7.00144004821777
1972	6.9326000213623
1973	7.57202005386353
1974	7.98526000976562
1976	9.84212017059326
1978	11.8572797775269
1979	12.733570098877
1980	12.5130500793457
1981	9.81626987457275
1982	11.4368095397949
1983	10.3915004730225
1984	10.383749961853
1987	8.16386032104492
1988	8.37687015533447
1989	8.7265100479126
1990	8.56223964691162
1991	9.03713035583496
1992	10.653829574585
1993	10.3956699371338
1994	11.9207401275635
1995	13.3542604446411
1996	13.830940246582
1997	15.1922798156738
1998	16.2977504730225
1999	18.0759906768799
2000	20.5238304138184
2003	26.1835594177246
2004	27.655179977417
2005	29.5591697692871
2006	32.0226516723633
2007	34.3184700012207
2008	38.7309799194336
2009	42.1867790222168
2010	44.6378593444824
2011	46.8142013549805
2013	45.2535705566406
2014	48.6246681213379
2015	44.6375885009766
2016	47.1402206420898
2017	43.6809616088867
2018	42.6408882141113
2020	37.7000007629395