Year	% gross
1970	88.7045135498047
1971	87.5094528198242
1972	87.4446105957031
1973	89.4741134643555
1974	89.5636596679688
1975	91.9386825561523
1976	93.7577667236328
1977	94.5242462158203
1978	93.4158706665039
1979	94.2055435180664
1980	94.9580001831055
1981	96.1546173095703
1982	97.1099319458008
1983	98.2007598876953
1984	99.2387390136719
1985	100.036209106445
1986	100.624488830566
1987	100.005500793457
1988	99.8021774291992
1989	99.1272430419922
1990	97.6808776855469
1991	96.8586883544922
1992	96.2072982788086
1993	96.3085632324219
1994	96.5255279541016
1995	96.4999084472656
1996	96.1475524902344
1997	96.6766204833984
1998	96.9135284423828
1999	97.5419006347656
2000	98.4447708129883
2001	98.8569030761719
2002	99.287712097168
2003	101.0263671875
2004	101.900039672852
2005	102.261901855469
2006	102.288940429688
2007	103.250030517578
2008	103.476249694824
2009	103.303619384766
2010	102.497627258301
2011	102.296478271484
2012	102.957481384277
2013	103.276611328125
2014	101.734031677246
2015	101.316558837891
2016	102.487327575684
2017	102.082046508789
2018	99.2600708007812
2019	99.3791122436523
2020	99.983757019043
2021	100.021179199219
2022	101.600288391113