Year	% gross
1970	20.0041198730469
1971	19.9985103607178
1972	21.1864795684814
1973	22.4961795806885
1974	23.4250507354736
1975	25.2075901031494
1976	26.964469909668
1977	27.7761192321777
1978	28.8764991760254
1979	29.245189666748
1980	30.1432800292969
1981	31.2856597900391
1982	32.181640625
1983	32.9609298706055
1984	33.7085914611816
1985	34.5080604553223
1986	35.2277297973633
1987	36.2694282531738
1988	37.5941390991211
1989	39.0212097167969
1990	40.8704414367676
1991	42.4589691162109
1992	45.1725006103516
1993	48.2985916137695
1994	50.9352989196777
1995	53.2372398376465
1996	55.1423606872559
1997	56.5706214904785
1998	56.0808181762695
1999	58.2154312133789
2000	59.9443893432617
2001	62.4992218017578
2002	65.3188705444336
2003	67.9040222167969
2004	70.1806716918945
2005	72.3671188354492
2006	73.7762680053711
2007	74.9147872924805
2008	76.0091094970703
2009	77.2945098876953
2010	78.7595672607422
2011	80.0451126098633
2012	80.9931793212891
2013	81.8736114501953
2014	82.6382904052734
2015	83.4015884399414
2016	84.4321517944336
2017	85.0484237670898
2018	85.6023025512695
2019	86.8605499267578
2020	87.7769622802734
2021	89.7040023803711
2022	89.8947906494141