Year	% gross
1970	41.9064407348633
1971	43.0632095336914
1972	45.2835311889648
1973	47.412899017334
1974	50.0380401611328
1975	51.2155303955078
1976	52.4641418457031
1977	51.8343086242676
1978	51.3774185180664
1979	51.2245483398438
1980	51.7197113037109
1981	52.6130218505859
1982	55.4765014648438
1983	57.334228515625
1984	61.9390983581543
1985	66.2130126953125
1986	66.6978607177734
1987	67.0159912109375
1988	67.2230224609375
1996	74.4451904296875
1997	71.1821136474609
1998	78.392692565918
1999	89.0202331542969
2000	93.1792221069336
2001	94.4552307128906
2002	93.9069595336914
2003	92.6349487304688
2004	91.5119094848633
2005	89.3027572631836
2006	87.6107330322266
2007	86.891960144043
2008	87.4148025512695
2009	90.7591018676758
2010	94.0550994873047
2011	95.4152069091797
2012	97.7535629272461
2013	100.100433349609
2014	101.949432373047
2015	103.726440429688
2016	106.500617980957
2017	107.390281677246
2018	106.639427185059
2019	107.499336242676
2020	109.090042114258
2021	113.274299621582