Year	% gross
1970	30.4338207244873
1971	30.2347507476807
1972	31.492359161377
1973	31.964599609375
1974	32.1786613464355
1975	33.6253395080566
1976	35.6031913757324
1977	34.8199615478516
1978	35.1760101318359
1979	34.663158416748
1980	34.9954986572266
1981	35.5990600585938
1982	36.2100715637207
1983	36.7089385986328
1984	37.0754318237305
1985	37.3389511108398
1986	37.5978507995605
1987	38.0691108703613
1988	38.6206893920898
1989	39.2245597839355
1990	39.6431198120117
1991	40.873119354248
1992	42.5895118713379
1993	45.1833305358887
1994	47.225658416748
1995	48.3344306945801
1996	49.5554389953613
1997	50.3240203857422
1998	49.5482292175293
1999	51.1100883483887
2000	52.2349090576172
2001	53.856330871582
2002	55.478931427002
2003	57.1231918334961
2004	58.358341217041
2005	59.5918807983398
2006	60.2324485778809
2007	60.7636299133301
2008	61.2030982971191
2009	61.8173484802246
2010	63.0408782958984
2011	64.2945709228516
2012	65.2834701538086
2013	66.1807098388672
2014	66.9935302734375
2015	67.4675598144531
2016	67.9251327514648
2017	67.9654998779297
2018	67.9646224975586
2019	68.4773101806641
2020	68.5201873779297
2021	69.10693359375
2022	69.2295379638672