Year	% gross
1970	51.9383811950684
1971	51.8983192443848
1972	52.6681709289551
1973	52.6908683776855
1974	51.9811096191406
1975	58.0252685546875
1976	60.650821685791
1977	62.007251739502
1978	63.3927307128906
1979	64.6183624267578
1980	67.3195037841797
1981	65.0503997802734
1982	65.270881652832
1983	66.0239486694336
1984	66.1018295288086
1985	67.8249664306641
1986	68.8854217529297
1987	69.428108215332
1988	70.8982620239258
1989	70.1585998535156
1990	71.0470504760742
1991	71.9969635009766
1992	71.686897277832
1993	70.1307601928711
1994	71.6464614868164
1995	73.2279968261719
1996	74.7208480834961
1997	76.2162170410156
1998	77.790771484375
1999	79.0937881469727
2000	79.9451522827148
2001	81.0530166625977
2002	81.2383270263672
2003	81.357551574707
2004	83.8406295776367
2005	83.7573776245117
2006	84.9599990844727
2007	86.1916732788086
2008	87.1454010009766
2009	88.2819900512695
2010	88.7433700561523
2011	89.9719009399414
2012	89.1140213012695
2013	87.8251113891602
2014	88.160026550293
2015	87.4502029418945
2016	89.7464981079102
2017	88.71875
2018	87.9726104736328
2019	89.0767669677734
2020	88.3277206420898
2021	86.7457962036133
2022	87.1552276611328