Year	% gross
1971	64.4637298583984
1972	60.965030670166
1973	64.1761627197266
1974	67.2082366943359
1975	68.8330078125
1976	73.5080032348633
1977	76.4340591430664
1978	77.5801086425781
1979	84.2347869873047
1980	83.2282562255859
1981	83.9249877929688
1982	87.6083679199219
1983	87.3558807373047
1984	87.2757186889648
1985	89.8123321533203
1986	95.2538528442383
1987	97.275032043457
1988	99.655158996582
1989	100.932159423828
1990	99.0625305175781
1991	101.434928894043
1992	102.79271697998
1993	106.844909667969
1994	109.606376647949
1995	111.825927734375
1996	113.977119445801
1997	114.022621154785
1998	104.511108398438
1999	106.685966491699
2000	110.135612487793
2001	112.263938903809
2002	111.736122131348
2003	111.377029418945
2004	111.59147644043
2005	114.071868896484
2006	113.75170135498
2007	113.777763366699
2008	113.826263427734
2009	114.736389160156
2010	121.250129699707
2011	125.258926391602
2012	127.079727172852
2013	126.109092712402
2014	124.852828979492
2015	124.76838684082
2016	122.7587890625
2017	119.481018066406
2018	118.113502502441
2019	116.712089538574
2020	115.533317565918
2021	116.881942749023