Year	% gross
1970	53.4857215881348
1971	53.1436309814453
1972	55.3382415771484
1973	58.1196784973145
1974	58.4886207580566
1975	60.5805206298828
1976	62.6589584350586
1977	64.0105133056641
1978	65.9894104003906
1979	67.1971588134766
1980	68.6579971313477
1981	70.2832565307617
1982	70.8800277709961
1983	71.458366394043
1984	71.2100982666016
1985	69.8812103271484
1986	69.5456771850586
1987	68.3204727172852
1988	70.2508163452148
1989	69.8712997436523
1990	68.8569869995117
1991	70.8422012329102
1992	70.9563903808594
1993	71.3195877075195
1994	72.1916427612305
1995	73.5394668579102
1996	73.871940612793
1997	76.574348449707
1998	77.0110626220703
1999	76.7445526123047
2000	78.7420120239258
2001	80.8570098876953
2002	85.4174194335938
2003	88.2347869873047
2004	90.6940383911133
2005	93.179931640625
2006	95.4866790771484
2007	96.9504470825195
2008	99.3388900756836
2009	99.7691192626953
2010	99.9920425415039
2011	100.111351013184
2012	100.68399810791
2013	100.07453918457
2014	99.8392028808594
2015	99.350212097168
2016	99.9048690795898
2017	100.562828063965
2018	101.624542236328
2019	102.52628326416
2020	103.046478271484
2021	102.255088806152
2022	102.310173034668