Year	% gross
1971	106.190399169922
1972	105.758041381836
1973	105.338722229004
1974	104.713600158691
1975	103.264198303223
1976	102.37638092041
1977	102.034851074219
1978	101.371803283691
1979	100.541351318359
1980	99.7144622802734
1981	99.4103012084961
1982	100.034698486328
1983	100.185516357422
1984	100.475288391113
1985	101.07177734375
1986	101.624206542969
1987	101.406440734863
1988	101.250679016113
1989	100.106750488281
1990	99.5144882202148
1991	98.9403991699219
1992	98.7725524902344
1993	100.131141662598
1994	99.9187698364258
1995	98.4022903442383
1996	98.9922332763672
1997	100.949028015137
1998	101.948547363281
1999	101.069580078125
2000	100.339080810547
2001	100.530227661133
2002	100.300102233887
2003	100.183227539062
2004	100.051498413086
2005	99.9291229248047
2006	99.6375198364258
2007	99.1174926757812
2008	98.238639831543
2009	98.0396499633789
2010	98.6196365356445
2011	99.2583465576172
2012	100.680816650391
2013	100.073501586914
2014	99.5637130737305
2017	97.6803283691406
2018	94.4897613525391
2019	94.9449615478516
2020	82.211540222168
2021	95.7681884765625
2022	100.108032226562