Year	% gross
1971	50.5840606689453
1972	48.098461151123
1973	55.5442581176758
1974	58.9050216674805
1975	65.2255401611328
1976	70.5612106323242
1977	74.5752792358398
1978	76.6334609985352
1979	80.3052215576172
1980	86.2626113891602
1981	87.2868270874023
1982	87.7897720336914
1983	93.526611328125
1984	91.2810287475586
1985	94.1123886108398
1986	102.841247558594
1987	105.291160583496
1988	107.359046936035
1989	108.243957519531
1990	104.843208312988
1991	107.86897277832
1992	110.783531188965
1993	115.88159942627
1994	119.080291748047
1995	121.375633239746
1996	126.142051696777
1997	120.909561157227
1998	111.873672485352
1999	113.854263305664
2000	116.867172241211
2001	118.565773010254
2002	119.03498840332
2003	117.701393127441
2004	118.77808380127
2005	121.273582458496
2006	121.005409240723
2007	121.423683166504
2008	120.799942016602
2009	120.13614654541
2010	124.076477050781
2011	127.101058959961
2012	128.53596496582
2013	127.360443115234
2014	125.847549438477
2015	124.946182250977
2016	123.811912536621
2017	121.695846557617
2018	120.827651977539
2019	120.450668334961
2020	119.322708129883
2021	121.494972229004