Year	% gross
1971	73.7754211425781
1974	73.8250579833984
1975	75.7553100585938
1976	81.6568908691406
1977	80.4293975830078
1978	76.2485427856445
1979	67.3326721191406
1980	65.0800628662109
1981	64.5488128662109
1982	65.8376007080078
1983	68.4938278198242
1984	69.5931701660156
1985	71.9887619018555
1986	73.596321105957
1987	73.1959915161133
1988	71.5279693603516
1989	71.1326904296875
1990	70.8119812011719
1991	70.4532089233398
1992	70.5766525268555
1993	71.0450820922852
1994	72.5781707763672
1995	94.4061126708984
1996	76.7760925292969
1997	78.3464736938477
2001	103.526000976563
2002	101.396240234375
2003	82.5185165405273
2004	84.0577697753906
2005	86.6051712036133
2006	82.8744125366211
2007	81.7946929931641
2008	81.6262664794922
2009	81.3439788818359
2010	78.5485610961914
2011	95.1619567871094
2012	107.595596313477
2013	108.85986328125
2014	113.625427246094
2015	124.225730895996
2016	166.993057250977
2017	164.553985595703
2018	165.693603515625
2019	166.160919189453
2020	160.214385986328