Year	% gross
1970	1.6298999786377
1971	1.63283002376556
1972	1.63674998283386
1973	1.65216994285583
1974	1.69177997112274
1975	1.71144998073578
1976	1.73294997215271
1977	1.74818003177643
1978	1.78926002979279
1979	1.81031000614166
1980	1.85355997085571
1981	1.88530004024506
1982	1.94249999523163
1983	1.96505999565125
1984	2.02503991127014
1985	2.09292006492615
1986	2.19765996932983
1987	2.29131007194519
1988	2.38216996192932
1989	2.50889992713928
1990	2.48583006858826
1991	2.60519003868103
1992	2.72233009338379
1993	2.91835999488831
1994	3.17090010643005
1995	3.10852003097534
1996	3.08493995666504
1997	3.07846999168396
1998	3.11168003082275
1999	3.18781995773315
2000	3.41373991966248
2001	3.69981002807617
2002	3.98347997665405
2003	4.19351005554199
2004	4.44754981994629
2005	4.66098022460938
2006	4.96175003051758
2007	5.09671020507812
2008	5.41028022766113
2009	5.91009998321533
2010	6.38773012161255
2011	6.6485800743103
2012	7.09697008132935
2013	7.38496017456055
2014	7.46288013458252
2015	7.61547994613647
2016	7.81983995437622
2017	8.03938007354736
2018	8.1327600479126
2019	8.07674026489258
2020	8.52954959869385
2021	8.1677303314209