Year	% gross
1970	16.9663200378418
1971	17.6438007354736
1972	18.8713493347168
1973	19.0923194885254
1974	19.7710609436035
1975	20.1984996795654
1976	20.3958492279053
1977	20.7320098876953
1978	21.2921009063721
1979	22.0888500213623
1980	23.1918296813965
1981	24.2525596618652
1982	25.0625591278076
1983	25.5821990966797
1984	26.3003101348877
1985	27.7180004119873
1986	28.9052391052246
1987	31.5448608398438
1988	31.0947093963623
1989	34.7587890625
1990	37.0239601135254
1991	40.1808700561523
1992	38.6037902832031
1993	33.6376304626465
1994	22.9967308044434
1995	23.13258934021
1996	24.4925594329834
1997	26.5719108581543
2004	49.3067207336426
2005	60.0809211730957
2006	69.7215194702148
2007	70.4383697509766
2008	74.881462097168
2009	71.0615997314453
2010	73.9286575317383
2011	77.6985244750977
2012	75.6146545410156
2013	77.3656158447266
2014	78.1455383300781
2015	79.2334213256836
2016	82.6459884643555
2017	85.3497543334961
2018	86.6691207885742
2019	86.3318023681641
2020	85.8690795898438
2021	80.1474227905273