Year	% gross
1970	28.3867797851562
1971	28.3603897094727
1972	29.5575199127197
1973	30.063289642334
1974	30.3274097442627
1975	31.8094005584717
1976	33.8071594238281
1977	33.0826416015625
1978	33.3810806274414
1979	32.8495903015137
1980	33.0197601318359
1981	33.4466705322266
1982	33.9117813110352
1983	34.2005004882812
1984	34.555290222168
1985	34.8387298583984
1986	35.0384407043457
1987	35.5400886535645
1988	36.2156791687012
1989	36.7864303588867
1990	37.2152099609375
1991	38.2793312072754
1992	39.6314392089844
1993	41.7647018432617
1994	43.6888008117676
1995	44.6095008850098
1996	45.8938407897949
1997	46.7883796691895
1998	46.2266006469727
1999	47.5906791687012
2000	48.8655395507812
2001	50.1766700744629
2002	51.4451217651367
2003	52.9025993347168
2004	53.975700378418
2005	55.1423683166504
2006	56.1330108642578
2007	56.9415016174316
2008	57.6647491455078
2009	58.824520111084
2010	60.5595817565918
2011	61.816219329834
2012	63.0963096618652
2013	64.4131011962891
2014	65.4991073608398
2015	66.566047668457
2016	68.4049682617188
2017	68.9804306030273
2018	69.4272003173828
2019	69.8278579711914
2020	69.9651489257812
2021	70.3811111450195
2022	70.3243179321289