Year	% gross
1971	61.6533088684082
1972	68.8501281738281
1973	74.6328887939453
1974	77.5990295410156
1975	80.7730102539062
1976	93.5190277099609
1977	98.1942825317383
1978	97.6042175292969
1979	94.1813430786133
1980	91.7685394287109
1981	88.1638412475586
1982	94.9387130737305
1983	96.1774826049805
1984	95.8984832763672
1985	93.8554306030273
1986	93.220703125
1987	92.3796310424805
1988	94.2568511962891
1989	98.3102264404297
1990	102.32389831543
1991	104.006652832031
1992	100.77953338623
1993	99.2421722412109
1994	100.862937927246
1995	102.688140869141
1996	100.12816619873
1997	97.3000564575195
1998	98.2942276000977
2002	102.349700927734
2003	100.775382995605
2004	99.4690628051758
2005	99.6575775146484
2006	99.7049102783203
2007	97.9812774658203
2009	91.9195404052734
2010	94.2770614624023
2011	96.6201629638672
2012	106.778038024902
2013	111.886131286621
2014	118.973251342773
2015	125.636726379395
2016	116.86792755127
2017	111.890777587891
2019	115.148788452148
2020	115.833160400391