Year	% gross
1970	59.7808418273926
1971	58.9561500549316
1972	58.5409393310547
1973	56.1395683288574
1974	53.9808807373047
1975	56.7462882995605
1976	59.9402084350586
1977	56.2229194641113
1978	55.6804313659668
1979	54.0320510864258
1980	54.2207183837891
1981	56.0284690856934
1982	57.2059593200684
1983	58.0524291992188
1984	58.8946685791016
1985	58.8245582580566
1986	59.6233787536621
1987	61.5124893188477
1988	62.9595184326172
1989	63.6686782836914
1990	64.1143493652344
1991	65.2436294555664
1992	68.7406387329102
1993	69.488899230957
1994	70.2472915649414
1995	70.6416320800781
1996	69.7148818969727
1997	64.8578567504883
1998	60.086368560791
1999	60.6269493103027
2000	61.4641189575195
2001	62.2789192199707
2002	63.0293388366699
2003	63.8922882080078
2004	64.7737503051758
2005	65.5178375244141
2006	66.4798965454102
2007	67.5404434204102
2008	68.6007080078125
2009	69.5307006835938
2010	70.4459609985352
2011	71.5007476806641
2012	72.3149108886719
2013	73.2643737792969
2014	73.6286468505859
2015	73.9376907348633
2016	74.3881607055664
2017	73.5008392333984
2018	73.299430847168
2019	72.7824478149414
2020	71.8410415649414
2021	68.3888778686523
2022	68.475227355957