Year	% gross
1971	1.32228994369507
1972	1.43441998958588
1977	1.94958996772766
1978	2.0262598991394
1980	2.56574988365173
1981	2.76548004150391
1982	2.50752997398376
1983	2.62071990966797
1984	2.24307990074158
1985	2.30314993858337
1986	2.45343995094299
1992	3.15739989280701
1997	3.21938991546631
1999	3.31120991706848
2004	4.90862989425659
2005	5.40511989593506
2006	5.5802001953125
2007	6.20996999740601
2008	7.81437015533447
2009	7.92249011993408
2010	7.58721017837524
2011	10.0053596496582
2012	10.1298198699951
2013	10.4236698150635
2014	10.8330898284912
2015	10.9290800094604
2016	11.130820274353
2017	11.7735300064087
2018	13.0590801239014
2019	13.3833703994751
2020	14.2285404205322
2021	15.7343301773071
2022	16.8081398010254