Year	% gross
1970	103.553596496582
1971	105.390548706055
1972	105.211242675781
1973	106.807266235352
1974	107.423011779785
1975	106.773887634277
1976	106.746643066406
1977	109.583396911621
1978	111.140800476074
1979	114.68138885498
1980	115.296783447266
1981	115.160003662109
1982	115.834846496582
1983	114.550888061523
1984	116.078079223633
1985	115.471939086914
1986	114.424858093262
1987	113.793296813965
1988	115.164176940918
1989	113.118476867676
1990	115.677993774414
1991	112.384819030762
1992	113.024063110352
1993	113.120559692383
1994	113.379821777344
1995	113.92121887207
1996	114.780792236328
1997	113.481483459473
1998	116.462669372559
1999	117.495666503906
2000	116.605583190918
2001	116.171630859375
2002	116.273849487305
2003	115.248153686523
2004	115.310752868652
2005	114.518218994141
2006	112.27864074707
2007	114.03311920166
2008	113.672721862793
2009	113.910980224609
2010	107.137382507324
2011	106.371917724609
2012	106.625862121582
2013	107.368118286133
2014	106.355812072754
2015	105.463623046875
2016	104.840660095215
2017	104.437400817871
2018	104.271377563477
2019	104.006820678711
2020	103.11060333252
2021	102.609176635742
2022	103.156867980957