Year	% gross
1970	7.24444007873535
1971	7.23634004592896
1972	7.29421997070312
1973	7.44488000869751
1974	7.6585898399353
1975	7.9925799369812
1976	8.3750696182251
1977	8.46146965026855
1978	8.71864986419678
1979	9.18430042266846
1980	9.65203952789307
1981	10.0813302993774
1982	9.90509033203125
1983	9.92510986328125
1984	9.97157001495361
1985	9.91679000854492
1986	10.2868900299072
1987	10.5629997253418
1988	10.2422103881836
1989	10.2891502380371
1990	10.3065099716187
1991	10.3098297119141
1992	10.301609992981
1993	10.403450012207
1994	11.0433397293091
1995	11.6591701507568
1996	12.6255197525024
1997	13.5081195831299
1998	14.3845500946045
1999	15.3342399597168
2000	16.2412700653076
2001	17.242259979248
2002	18.4725303649902
2003	19.9407997131348
2004	21.0040798187256
2005	21.8213405609131
2006	22.9422302246094
2007	24.0922908782959
2008	25.3737106323242
2009	26.3602199554443
2010	28.020959854126
2011	30.2668304443359
2012	31.649299621582
2013	32.4648284912109
2014	35.9531898498535
2015	37.6047401428223
2016	38.2924690246582
2017	38.8987617492676
2018	39.3909301757812
2019	40.1616897583008
2020	41.8074417114258
2021	43.9527587890625
2022	45.7340507507324