Year	% gross
1971	12.4783401489258
1972	12.9400997161865
1973	13.2437896728516
1974	13.729419708252
1975	14.319860458374
1976	14.7556495666504
1977	15.2248401641846
1978	15.9283895492554
1979	16.5981693267822
1980	17.528959274292
1981	18.6176891326904
1982	20.0947799682617
1983	21.8016109466553
1984	23.2660293579102
1985	25.3941307067871
1986	27.3821105957031
1987	29.1894607543945
1988	29.6122493743896
1989	30.6886100769043
1990	31.5820407867432
1991	32.5576515197754
1992	33.1145706176758
1993	34.0346603393555
1994	35.1898918151855
1995	37.0268592834473
1996	38.8435401916504
1998	41.0499114990234
1999	42.1652297973633
2000	43.0905914306641
2001	44.6176795959473
2002	45.4005584716797
2003	47.7917098999023
2004	52.4313697814941
2005	56.9559211730957
2006	60.6565017700195
2007	66.1942977905273
2008	71.7466125488281
2009	76.2457580566406
2010	76.8965606689453
2011	80.1960678100586
2012	82.4147720336914
2013	83.6841430664062
2014	84.8977890014648
2015	85.4470291137695
2016	87.6474685668945
2017	89.7315216064453
2018	91.7203674316406
2019	89.9551162719727
2020	87.8472290039062
2021	87.1249923706055
2022	82.3567962646484