Year	% gross
1970	1.10993003845215
1971	1.11263000965118
1972	1.12058997154236
1973	1.13695001602173
1974	1.16726994514465
1975	1.18929994106293
1976	1.21909999847412
1977	1.25879001617432
1978	1.30608999729156
1979	1.36817002296448
1980	1.42045998573303
1981	1.48968005180359
1982	1.5550400018692
1983	1.58739995956421
1984	1.64371001720428
1985	1.72906994819641
1986	1.82743000984192
1987	1.90701997280121
1988	1.96478998661041
1989	2.05533003807068
1990	2.09126996994019
1991	2.21914005279541
1992	2.35196995735168
1993	2.5395200252533
1994	2.76905989646912
1995	2.8059298992157
1996	2.88399004936218
1997	2.98262000083923
1998	3.09136009216309
1999	3.23749995231628
2000	3.57000994682312
2001	3.8756799697876
2002	4.19328022003174
2003	4.45465993881226
2004	4.69587993621826
2005	4.9625301361084
2006	5.16589021682739
2007	5.32224988937378
2008	5.58158016204834
2009	5.96370983123779
2010	6.33829021453857
2011	6.54684019088745
2012	6.94962978363037
2013	7.30813980102539
2014	7.43646001815796
2015	7.59264993667603
2016	7.6729998588562
2017	7.83545017242432
2018	7.99588012695312
2019	8.05747985839844
2020	8.41979026794434
2021	8.28631973266602