Year	% gross
1970	48.560359954834
1971	48.8553314208984
1972	49.1489715576172
1973	50.3093681335449
1974	51.3334503173828
1975	53.3374214172363
1976	55.8659706115723
1977	58.341869354248
1978	60.5163688659668
1979	62.1558113098145
1980	64.2966918945312
1981	66.0888900756836
1982	65.6873474121094
1983	65.8461380004883
1984	65.5830917358398
1985	64.2987976074219
1986	63.8816986083984
1987	62.6779594421387
1988	62.7378082275391
1989	61.4916496276855
1990	60.0744590759277
1991	61.9225196838379
1992	60.8142395019531
1993	61.1164093017578
1994	62.0983390808105
1995	64.3306427001953
1996	64.5063095092773
1997	68.9054336547852
1998	69.5864028930664
1999	69.1081695556641
2000	71.432861328125
2001	74.8363037109375
2002	80.3805999755859
2003	83.7540130615234
2004	86.8449172973633
2005	89.7777099609375
2006	92.4297027587891
2007	94.8481979370117
2008	98.7032318115234
2009	98.6571578979492
2010	98.4682312011719
2011	98.1745223999023
2012	99.0696105957031
2013	99.0897369384766
2014	99.1922607421875
2015	98.5370178222656
2016	99.1846237182617
2017	99.7224502563477
2018	100.643630981445
2019	101.624816894531
2020	102.384208679199
2021	101.500099182129
2022	101.547393798828