Year	% gross
1970	6.88872003555298
1971	6.95298004150391
1972	7.85733985900879
1973	8.85196971893311
1974	10.074649810791
1975	11.4041299819946
1976	11.7879495620728
1977	11.9955701828003
1978	12.3694400787354
1979	12.9179000854492
1980	13.4335098266602
1981	13.8787298202515
1982	14.1289701461792
1983	14.7107496261597
1984	15.1856603622437
1985	15.7524499893188
1986	16.3475208282471
1987	16.5882797241211
1988	17.013650894165
1989	17.0524406433105
1990	16.9742393493652
1991	17.2725391387939
1992	17.161169052124
1993	17.0541801452637
1994	17.223970413208
1995	17.628080368042
1996	18.2250499725342
1997	19.1830997467041
1998	20.6434803009033
1999	21.980619430542
2000	23.1451091766357
2001	24.5127506256104
2002	26.2522106170654
2003	27.7580108642578
2004	29.156099319458
2005	30.8382091522217
2006	34.0032081604004
2007	35.429500579834
2008	38.4127502441406
2009	39.4873809814453
2010	41.0793304443359
2011	42.6743011474609
2012	44.2955207824707
2013	45.3068084716797
2014	46.9207000732422
2015	48.2002296447754
2016	50.1881904602051
2017	51.5356407165527
2018	52.232479095459
2019	53.1361618041992
2020	54.6142883300781
2021	56.4775581359863
2022	56.4497604370117