Year	% gross
1970	9.98770046234131
1971	9.83961963653564
1972	10.0489301681519
1973	10.2557802200317
1974	10.4876699447632
1975	10.9354200363159
1976	11.539400100708
1977	11.6153497695923
1978	11.8950004577637
1979	12.2173204421997
1980	12.6260204315186
1981	12.9652500152588
1982	12.9383697509766
1983	12.9530801773071
1984	12.946590423584
1985	12.8445100784302
1986	13.0440301895142
1987	13.2668304443359
1988	13.2153797149658
1989	13.3387603759766
1990	13.5106401443481
1991	13.6569900512695
1992	13.920729637146
1993	14.3374900817871
1994	14.9783201217651
1995	15.5128898620605
1996	16.2590103149414
1997	16.9523906707764
1998	17.4520702362061
1999	18.3372402191162
2000	19.0966205596924
2001	19.966739654541
2002	21.1167507171631
2003	22.2505893707275
2004	23.1679306030273
2005	23.9905395507812
2006	25.0335807800293
2007	25.9700603485107
2008	27.0341091156006
2009	27.9286403656006
2010	29.2719707489014
2011	30.9619998931885
2012	32.2163009643555
2013	33.0704116821289
2014	35.5506782531738
2015	36.6370391845703
2016	37.1831588745117
2017	37.5516510009766
2018	37.9363288879395
2019	38.7893714904785
2020	39.7894096374512
2021	41.0483512878418
2022	41.841251373291