Year	% gross
1971	37.5171089172363
1976	35.966381072998
1980	37.0667495727539
1981	38.4157485961914
1982	39.411319732666
1983	41.4009704589844
1984	43.5607490539551
1985	45.9478797912598
1986	47.3459205627441
1987	47.5869293212891
1988	47.3447113037109
1989	46.8157615661621
1990	47.6654586791992
1991	46.6668090820312
1992	43.3319892883301
1993	43.0419387817383
1994	41.1089706420898
1995	39.7630500793457
1996	43.0518112182617
1997	43.182071685791
1998	46.6532287597656
1999	49.4420700073242
2000	51.8044013977051
2001	54.3443717956543
2002	56.8730087280273
2003	59.4798316955566
2004	60.8694190979004
2005	63.722110748291
2006	66.4904403686523
2007	69.5346298217773
2008	70.5071029663086
2009	75.9017486572266
2010	82.6692733764648
2011	91.2559967041016
2012	98.5973968505859
2013	101.424392700195
2014	99.8547286987305
2015	98.0328598022461
2016	94.7553405761719
2017	91.3261489868164
2018	84.5396423339844
2019	80.1720199584961
2020	76.8908920288086
2021	73.9591369628906
2022	70.8675689697266