Year	% gross
1970	106.113296508789
1971	107.022163391113
1972	106.2900390625
1973	105.904327392578
1974	105.99243927002
1975	105.319801330566
1976	104.785263061523
1977	105.606857299805
1978	105.586967468262
1979	105.10913848877
1980	105.10774230957
1981	105.675773620605
1982	106.121002197266
1984	106.193161010742
1985	107.631126403809
1986	108.958290100098
1987	110.467620849609
1988	114.012519836426
1990	108.117088317871
1991	109.486709594727
1996	112.272331237793
1997	109.984733581543
1998	114.144020080566
1999	117.524360656738
2000	117.857681274414
2001	117.94270324707
2002	117.93285369873
2003	115.219947814941
2004	116.047142028809
2005	115.045951843262
2006	116.808967590332
2007	117.999839782715
2008	119.00910949707
2009	118.945541381836
2010	118.294456481934
2011	117.586700439453
2012	116.677909851074
2013	114.937522888184
2014	114.849250793457
2015	114.77953338623
2016	113.931190490723
2017	112.72940826416
2018	112.798812866211
2019	112.665710449219
2020	112.053588867188
2021	111.580436706543