Year	% gross
1970	24.8841304779053
1971	24.9955501556396
1972	25.6588306427002
1973	26.2993507385254
1974	26.8523292541504
1975	27.6196804046631
1976	28.3238506317139
1977	29.2461204528809
1978	30.0350093841553
1979	30.9839401245117
1980	32.089241027832
1981	32.9236183166504
1982	34.3726387023926
1983	36.1570701599121
1984	37.2467918395996
1985	38.3897094726562
1986	39.4879913330078
1987	40.1068916320801
1988	40.4705390930176
1989	40.8147010803223
1990	41.9936294555664
1991	43.3142395019531
1992	44.5353317260742
1993	45.8437004089355
1994	46.6839981079102
1995	47.35791015625
1996	47.8729209899902
1997	48.7235298156738
1998	48.790111541748
1999	48.8073883056641
2000	50.1273918151855
2001	50.9541511535645
2002	52.4276504516602
2003	53.9859008789062
2004	55.0567817687988
2005	56.0324897766113
2006	57.2595100402832
2007	59.0141906738281
2008	60.4178199768066
2009	60.8517417907715
2010	63.0227699279785
2011	65.2725372314453
2012	67.0822830200195
2013	68.0081481933594
2014	70.8313598632812
2015	71.5219116210938
2016	72.5432281494141
2017	72.1273574829102
2018	73.1824111938477
2019	73.5392227172852
2020	74.6201019287109
2021	75.8596420288086
2022	76.2182769775391