Year	% gross
1970	47.5908508300781
1971	48.2930488586426
1972	49.7201118469238
1973	52.5308418273926
1974	55.5536193847656
1975	57.6349983215332
1976	59.3817481994629
1977	59.5169296264648
1978	59.4150505065918
1979	58.8090286254883
1980	59.6960487365723
1981	61.1675300598145
1982	62.0716590881348
1983	61.905460357666
1984	68.6578826904297
1985	74.2885665893555
1986	73.8446273803711
1987	72.8724899291992
1988	73.6382827758789
1996	83.6859588623047
1997	78.8575668334961
1998	83.9390029907227
1999	96.6531524658203
2000	100.204521179199
2001	101.822372436523
2002	101.185386657715
2003	100.550346374512
2004	100.687850952148
2005	99.2958679199219
2006	98.5617828369141
2007	98.5978469848633
2008	99.8813781738281
2009	102.795051574707
2010	104.652938842773
2011	106.84245300293
2012	108.057029724121
2013	109.314056396484
2014	110.439140319824
2015	111.561492919922
2016	112.948463439941
2017	113.586540222168
2018	112.910827636719
2019	113.655281066895
2020	115.923881530762
2021	120.027320861816