Year	% gross
1970	44.5342292785645
1971	45.302978515625
1972	46.6843109130859
1973	48.079231262207
1974	50.3872909545898
1975	51.9620018005371
1976	53.0235710144043
1977	56.5583610534668
1978	60.3550300598145
1979	64.4385223388672
1980	67.6769714355469
1981	70.5148391723633
1982	72.4026489257812
1983	72.3623123168945
1984	71.8991088867188
1985	69.9164276123047
1986	67.8103408813477
1987	66.6858673095703
1988	64.7448425292969
1989	66.2909774780273
1990	64.9311599731445
1991	66.0446701049805
1992	66.0908203125
1993	66.9270172119141
1994	67.1655120849609
1995	67.4964599609375
1996	65.976692199707
1997	69.4603805541992
1998	70.5045471191406
1999	71.3489608764648
2000	73.7227325439453
2001	75.9353637695312
2002	78.1127090454102
2003	81.0572509765625
2004	83.5154800415039
2005	86.3828582763672
2006	88.8076400756836
2007	90.2194137573242
2008	91.8761367797852
2009	92.6856307983398
2010	92.7788314819336
2011	93.9077682495117
2012	95.2984313964844
2013	95.8076324462891
2014	95.264778137207
2015	94.5199279785156
2016	94.280632019043
2017	94.8866271972656
2018	95.6027297973633
2019	96.6564025878906
2020	97.5708084106445
2021	97.0043792724609
2022	97.0866622924805