Year	% gross
1970	34.2757682800293
1971	34.5358810424805
1972	37.063289642334
1973	38.6731605529785
1974	40.2649993896484
1975	43.0707092285156
1976	45.550708770752
1977	47.8955497741699
1978	49.8492584228516
1979	51.0223007202148
1980	51.9082489013672
1981	52.2874412536621
1982	53.2632102966309
1983	53.7257499694824
1984	54.4829406738281
1985	55.4464912414551
1986	57.8094291687012
1987	59.0794906616211
1988	59.5722999572754
1989	60.6788101196289
1990	63.6408996582031
1991	63.3910789489746
1992	62.3582305908203
1993	63.6306800842285
1994	66.35986328125
1995	65.7803497314453
1996	65.5514221191406
1997	66.5283203125
1998	67.7808685302734
1999	68.9739379882812
2000	69.9444122314453
2001	70.9970092773438
2002	71.6729125976562
2003	72.3865280151367
2004	72.9998626708984
2005	72.1572799682617
2006	71.9033584594727
2007	69.8492279052734
2008	70.9735412597656
2009	72.5957565307617
2010	73.3505172729492
2011	76.7274398803711
2012	77.7062606811523
2013	75.1951675415039
2014	75.371223449707
2015	75.2527770996094
2016	75.293083190918
2017	75.3539886474609
2018	75.4504776000977
2019	75.8295974731445
2020	76.4741592407227
2021	77.4195785522461
2022	77.7920532226562