Year	% gross
1970	17.2226104736328
1971	17.4484596252441
1972	18.103609085083
1973	18.7627792358398
1974	19.4011402130127
1975	20.4494209289551
1976	21.1889705657959
1977	21.8313293457031
1978	22.6140594482422
1979	23.4813003540039
1980	24.4507293701172
1981	25.3782691955566
1982	26.5221099853516
1983	28.7667503356934
1984	29.251070022583
1985	30.3796100616455
1986	31.6326503753662
1987	32.3456802368164
1988	32.9146003723145
1989	33.5121307373047
1990	34.7712783813477
1991	36.1326904296875
1992	37.3950119018555
1993	38.7855491638184
1994	40.0356483459473
1995	40.9099006652832
1996	41.6803283691406
1997	43.0157508850098
1998	43.725341796875
1999	44.3392791748047
2000	45.8134613037109
2001	46.7887992858887
2002	48.5652809143066
2003	50.8860397338867
2004	51.9103698730469
2005	53.1930084228516
2006	54.6215286254883
2007	56.7114715576172
2008	58.449520111084
2009	59.4967002868652
2010	61.7938499450684
2011	64.246711730957
2012	66.1751480102539
2013	67.8004989624023
2014	70.8991394042969
2015	71.5841217041016
2016	72.7957534790039
2017	72.317138671875
2018	73.5309066772461
2019	73.9708023071289
2020	74.773681640625
2021	75.5998611450195
2022	76.5361633300781