Year	% gross
1975	12.5883703231812
1977	20.4200801849365
1978	19.9952602386475
1979	20.9763603210449
1981	25.4246006011963
1982	28.4238300323486
1983	29.8227996826172
1984	32.5699195861816
1985	33.780948638916
1986	34.5551490783691
1987	34.7298812866211
1988	33.2205009460449
1989	34.4814186096191
1990	35.538818359375
1991	36.4919395446777
1992	33.5227203369141
1993	34.1684989929199
1994	35.1689796447754
1995	37.1815490722656
1996	39.6464881896973
1997	40.8771591186523
1998	44.3300094604492
1999	41.9517517089844
2000	43.3515281677246
2001	41.7224884033203
2002	42.6309509277344
2003	42.9275093078613
2004	44.2311782836914
2005	46.2208290100098
2006	48.9540100097656
2007	49.7141189575195
2008	47.3525314331055
2009	51.2834701538086
2010	47.1522102355957
2012	47.8116302490234
2013	47.5748901367188
2014	52.4515914916992
2015	50.8303909301758
2016	45.7873306274414
2017	49.0861396789551
2018	46.8640899658203
2019	51.534969329834
2020	57.635181427002
2021	59.6224784851074