Year	% gross
1980	100.83422088623
1981	100.905296325684
1982	103.661407470703
1983	102.94019317627
1984	103.169898986816
1985	102.996078491211
1986	102.968742370605
1987	102.351409912109
1988	103.190849304199
1989	104.006729125977
1990	104.980430603027
1991	103.550422668457
1992	103.463386535645
1993	103.382209777832
1994	103.705520629883
1995	104.525466918945
1996	103.371269226074
1997	103.242233276367
1998	103.083168029785
1999	102.467422485352
2000	102.31169128418
2001	102.089500427246
2002	101.855941772461
2003	101.590431213379
2004	101.325759887695
2005	101.034637451172
2006	100.871757507324
2007	100.619438171387
2008	100.268142700195
2009	100.088958740234
2010	99.818359375
2011	99.5113983154297
2012	99.3249969482422
2013	99.0628890991211
2014	99.4972610473633
2015	100.224067687988
2016	100.983123779297
2017	101.126907348633
2018	100.944061279297
2019	100.968650817871
2020	99.7953033447266
2021	97.8142166137695
2022	97.9574584960938