Year	% gross
1971	94.1094207763672
1972	93.8543090820312
1973	93.2785491943359
1974	92.1123809814453
1975	91.8518600463867
1976	91.1371078491211
1977	91.1966705322266
1978	90.7530975341797
1979	90.4664001464844
1980	90.2527008056641
1981	90.6744232177734
1982	94.2858505249023
1983	95.9849014282227
1984	98.6405181884766
1985	99.1086196899414
1986	98.7693023681641
1987	98.9468231201172
1988	99.6936874389648
1989	101.036323547363
1990	100.696891784668
1991	101.452217102051
1992	102.081008911133
1993	103.372421264648
1994	104.48168182373
1995	104.128189086914
1996	104.333282470703
1998	104.330436706543
1999	102.816497802734
2000	103.028327941895
2005	98.9900283813477
2006	99.2497711181641
2007	99.9420928955078
2008	100.842529296875
2009	101.646156311035
2010	101.401901245117
2011	102.081169128418
2012	111.200828552246
2013	111.995567321777
2014	112.353302001953
2015	112.301681518555
2016	112.142242431641
2017	112.01725769043
2018	111.47477722168
2019	110.749656677246
2020	110.127571105957
2021	109.207336425781