Year	% gross
1971	7.89995002746582
1972	7.40066003799438
1973	6.59394979476929
1974	7.20373010635376
1975	7.53714990615845
1976	8.37950038909912
1977	9.03174018859863
1978	9.66392993927002
1979	10.2384395599365
1980	10.9312696456909
1981	11.4482498168945
1982	11.7231597900391
1983	11.2860097885132
1984	11.2146301269531
1985	11.0515098571777
1986	11.0720901489258
1987	9.80902004241943
1988	8.73511981964111
1989	8.31027984619141
1990	8.06101989746094
1991	8.75673007965088
1992	10.0985498428345
1993	12.0217800140381
1994	12.9100904464722
1995	13.3893604278564
1996	18.6579704284668
1997	19.3039398193359
1998	19.4560394287109
1999	22.7768497467041
2000	24.6464405059814
2001	30.6334209442139
2002	37.4910697937012
2003	43.1249389648438
2004	46.7262802124023
2005	50.705379486084
2006	61.514289855957
2007	69.3181610107422
2008	85.2448806762695
2009	94.9386215209961
2010	87.8167419433594
2011	77.3923568725586
2012	61.6491394042969
2013	57.4266204833984
2014	57.0799789428711
2015	51.3097915649414
2016	55.4084510803223
2017	55.6918601989746
2018	57.525390625
2019	58.6085815429688
2020	56.7659606933594
2021	62.7675590515137