Year	% gross
1970	1.42215001583099
1971	1.43480002880096
1972	1.48409998416901
1973	1.54762005805969
1974	1.59974002838135
1975	1.66366004943848
1976	1.72016000747681
1977	1.79812002182007
1978	1.88021004199982
1979	1.98475003242493
1980	2.08523011207581
1981	2.21041011810303
1982	2.32692003250122
1983	2.37896990776062
1984	2.42970991134644
1985	2.57096004486084
1986	2.70976996421814
1987	2.66975998878479
1988	2.7988600730896
1989	2.91935992240906
1990	2.99261999130249
1991	3.06126999855042
1992	3.12596011161804
1993	3.21566009521484
1994	3.29601001739502
1995	3.33135008811951
1996	3.4049699306488
1997	3.49663996696472
1998	3.55124998092651
1999	3.6167299747467
2000	4.01209020614624
2001	4.38383007049561
2002	4.75567007064819
2003	5.14404010772705
2004	5.42745018005371
2005	5.77809000015259
2006	5.99288988113403
2007	6.13467979431152
2008	6.44928979873657
2009	6.73400020599365
2010	7.02473020553589
2011	7.35074996948242
2012	7.75982999801636
2013	8.12792015075684
2014	8.33207035064697
2015	8.42125988006592
2016	8.4806604385376
2017	8.54580974578857
2018	8.63045978546143
2019	8.60725975036621
2020	8.93830966949463
2021	8.77604961395264