Year	% gross
1970	64.9721374511719
1971	64.8764038085938
1972	66.4058227539062
1973	68.5984268188477
1974	68.6513519287109
1975	70.0265502929688
1976	71.0599975585938
1977	72.6991882324219
1978	72.0635604858398
1979	73.109130859375
1980	74.6738586425781
1981	76.4372329711914
1982	78.0128936767578
1983	79.4568176269531
1984	81.0512008666992
1985	81.7053680419922
1986	82.6508407592773
1987	82.2441482543945
1988	83.5604782104492
1989	84.6047286987305
1990	84.2454605102539
1991	84.9605102539062
1992	85.2867279052734
1993	86.3585662841797
1994	87.2280731201172
1995	86.8508911132812
1996	87.1937103271484
1997	87.4550323486328
1998	87.5412063598633
1999	88.1191635131836
2000	89.0146408081055
2001	89.5336608886719
2002	90.6936492919922
2003	96.1175537109375
2004	97.581672668457
2005	99.2037200927734
2006	100.218841552734
2007	102.024909973145
2008	102.840133666992
2009	103.051010131836
2010	103.393798828125
2011	103.21085357666
2012	104.038848876953
2013	106.247566223145
2014	105.009208679199
2015	105.29606628418
2016	108.577133178711
2017	107.186073303223
2018	98.9206924438477
2019	98.9089813232422
2020	99.7044525146484
2021	99.5067291259766
2022	102.171447753906