Year	% gross
1973	74.6857223510742
1974	76.7468032836914
1975	77.5670700073242
1976	78.2016830444336
1977	78.4901809692383
1978	79.640251159668
1979	82.0609970092773
1980	84.7860565185547
1983	88.1676712036133
1984	88.761833190918
1985	89.53369140625
1986	87.4215927124023
1987	87.2461318969727
1988	86.8935928344727
1989	87.1211929321289
1990	86.4176864624023
1991	87.5423431396484
1992	88.6620178222656
1993	89.1658630371094
1994	89.0709609985352
1999	96.8515167236328
2000	98.102180480957
2001	97.5640411376953
2002	98.740592956543
2003	97.3927536010742
2004	97.3357162475586
2005	96.9035491943359
2006	96.765998840332
2007	96.5175018310547
2008	95.8410186767578
2009	96.7854537963867
2010	97.5289611816406
2011	97.0620880126953
2012	97.0195999145508
2013	97.2703018188477
2014	96.8591384887695
2015	96.505241394043
2016	97.2603225708008
2017	96.8147277832031
2018	97.2627334594727
2019	96.8821868896484
2020	96.644172668457
2021	97.3891067504883