Year	% gross
1971	45.4679718017578
1972	44.9886207580566
1973	46.9628410339355
1974	49.9662704467773
1975	54.2275009155273
1976	59.3620681762695
1977	64.3330764770508
1978	69.595947265625
1979	73.6209335327148
1980	76.0834503173828
1981	78.1504516601562
1982	79.1595077514648
1983	79.8461837768555
1984	80.4529495239258
1985	82.2172927856445
1986	79.4904022216797
1987	78.1816635131836
1988	77.3166275024414
1989	75.715217590332
1990	75.5880432128906
1991	77.369987487793
1992	79.98779296875
1993	80.6538162231445
1994	82.6472320556641
1996	86.8060684204102
1999	88.3908004760742
2000	87.0306091308594
2002	86.4455184936523
2003	85.5809631347656
2004	83.9303894042969
2005	82.9468231201172
2006	83.5275421142578
2007	77.0900421142578
2008	78.209342956543
2010	75.6691207885742
2011	75.5702819824219
2012	75.5093612670898
2013	77.8430404663086
2014	72.8187026977539
2017	62.9417304992676
2018	63.4282608032227
2019	65.5323104858398
2020	66.8760299682617
2021	69.5172805786133
2022	70.9370422363281