Year	% gross
1976	71.8711395263672
1978	73.9937133789062
1979	76.2861785888672
1980	77.3495864868164
1981	78.4115371704102
1982	75.7429962158203
1983	72.9317474365234
1984	73.3545684814453
1985	75.6073837280273
1986	79.0105133056641
1987	80.1447601318359
1988	82.2236175537109
1989	83.3962097167969
1990	84.6945419311523
1991	85.8566436767578
1992	76.6328811645508
1993	70.0011215209961
1994	66.6715393066406
1995	65.1114807128906
1996	64.1563720703125
1997	64.3238906860352
1999	66.4852600097656
2000	67.2065505981445
2001	70.3057708740234
2004	75.6777725219727
2005	79.8229217529297
2006	82.1377182006836
2007	84.826530456543
2008	86.5737609863281
2009	88.6592330932617
2010	90.8425216674805
2011	93.5661392211914
2012	95.5498809814453
2013	99.1476593017578
2014	99.168571472168
2015	98.8955612182617
2016	96.7715301513672
2017	95.9890594482422
2018	96.664680480957
2019	95.7696914672852
2020	92.5838165283203
2021	93.3630828857422
2022	91.3896026611328