Year	% gross
1971	46.028018951416
1972	45.5034484863281
1974	44.5632019042969
1975	40.7884292602539
1976	53.1823387145996
1977	75.9047317504883
1978	75.7539978027344
1979	83.2791213989258
1989	94.275390625
1990	92.0550079345703
1991	95.0410995483398
1992	97.4434280395508
1993	98.4368591308594
1999	94.8291168212891
2000	93.94873046875
2001	90.6465606689453
2002	88.9324188232422
2003	88.2919998168945
2004	88.5524597167969
2005	86.9241104125977
2006	84.0251007080078
2007	82.0121688842773
2008	82.9444580078125
2009	84.7603988647461
2010	89.2052230834961
2011	94.7303771972656
2012	94.7736587524414
2013	91.7711029052734
2014	87.5318603515625
2015	88.6776428222656
2016	95.942626953125
2017	95.3088912963867
2018	95.621223449707
2019	90.5669631958008
2020	90.4162979125977
2021	86.4049682617188