Year	% gross
1971	57.627571105957
1972	54.6355400085449
1973	59.9350318908691
1974	63.1317100524902
1975	67.0649337768555
1976	72.0631408691406
1977	75.5218887329102
1978	77.1163177490234
1979	82.3140869140625
1980	84.7095413208008
1981	85.5651626586914
1982	87.6968231201172
1983	90.3616104125977
1984	89.2257537841797
1985	91.9063415527344
1986	98.9475173950195
1987	101.178970336914
1988	103.408538818359
1989	104.496520996094
1990	101.883163452148
1991	104.578582763672
1992	106.694358825684
1993	111.253540039062
1994	114.225776672363
1995	116.481369018555
1996	119.908699035645
1997	117.380149841309
1998	108.098373413086
1999	110.177459716797
2000	113.414573669434
2001	115.331329345703
2002	115.286270141602
2003	114.452789306641
2004	115.084503173828
2005	117.570930480957
2006	117.273666381836
2007	117.488693237305
2008	117.210586547852
2009	117.357116699219
2010	122.622512817383
2011	126.152786254883
2012	127.786712646484
2013	126.716270446777
2014	125.335800170898
2015	124.85466003418
2016	123.269889831543
2017	120.555923461914
2018	119.430198669434
2019	118.524719238281
2020	117.367767333984
2021	119.114921569824