Year	% gross
1971	0.011459999717772
1972	0.010219999589026
1973	0.015659999102354
1974	0.0309399999678135
1975	0.0428400002419949
1976	0.0824899971485138
1977	0.0789500027894974
1978	0.095940001308918
1979	0.0919699966907501
1980	0.0943000018596649
1981	0.118100002408028
1982	0.178059995174408
1983	0.216140002012253
1984	0.2308100014925
1985	0.261159986257553
1986	0.272390007972717
1987	0.295069992542267
1988	0.31657999753952
1989	0.353749990463257
1990	0.341239988803864
1991	0.321020007133484
1992	0.418339997529984
1993	0.494590014219284
1994	0.511099994182587
1995	0.486160010099411
1996	0.510500013828278
1997	0.440360009670258
1999	0.45032998919487
2002	0.69038999080658
2003	0.68572998046875
2005	1.34470999240875
2006	1.42947995662689
2007	1.51596999168396
2008	1.94585001468658
2009	2.12954998016357
2010	2.16487002372742
2011	2.59190011024475
2012	2.865070104599
2013	3.00565004348755
2014	3.18254995346069
2015	3.34371995925903
2016	3.63248991966248
2017	3.9677300453186
2018	4.6211199760437
2019	4.93659019470215
2020	5.41250991821289
2021	6.92286014556885
2022	7.46144008636475