Year	% gross
1971	66.1421890258789
1972	67.2488708496094
1973	68.8812408447266
1974	70.9307174682617
1975	71.7129592895508
1976	73.8776626586914
1977	77.163932800293
1978	79.5019836425781
1979	81.5137786865234
1980	84.3004684448242
1981	86.7509765625
1982	87.8659820556641
1983	89.2841567993164
1984	90.309440612793
1985	90.2709579467773
1986	90.089241027832
1987	94.5065765380859
1988	101.127151489258
1989	109.511627197266
1990	109.361213684082
1991	95.1565933227539
1992	103.853637695313
1993	87.8151626586914
1994	86.2397537231445
1995	90.8410568237305
1996	90.5739517211914
1997	87.9489822387695
1998	88.005126953125
1999	93.1581802368164
2000	90.2519836425781
2001	91.223991394043
2002	97.1854934692383
2003	106.53800201416
2004	113.418632507324
2005	114.432403564453
2006	111.721870422363
2007	108.240119934082
2008	103.695098876953
2009	100.016510009766
2010	100.687561035156
2011	102.049789428711
2012	102.339088439941
2013	102.975738525391
2014	103.211418151855
2015	103.655151367188
2016	103.700691223145
2017	104.731231689453
2018	108.099960327148
2019	111.77131652832
2020	112.001342773438