Year	% gross
1971	0
1972	0
1973	0.0987000018358231
1974	0.12032999843359
1975	0.13154000043869
1976	0.194049999117851
1977	0.254390001296997
1978	0.25042000412941
1979	0.285470008850098
1980	0.279399991035461
1981	0.396160006523132
1982	0.511020004749298
1983	0.578050017356873
1984	0.607749998569489
1985	0.718190014362335
1987	0.794019997119904
1989	0.874090015888214
1990	1.03510999679565
2003	1.1501499414444
2004	1.10266995429993
2005	1.27969002723694
2006	1.34706997871399
2007	1.24134004116058
2008	1.40525996685028
2009	1.71902000904083
2010	1.76681995391846
2011	1.81793999671936
2012	2.15899991989136
2015	4.61009979248047
2016	4.65919017791748
2017	5.1899299621582
2018	6.47764015197754
2019	5.3952898979187
2020	5.73299980163574