Year	% gross
1970	22.1806392669678
1971	22.0342693328857
1972	22.2799892425537
1973	22.6492404937744
1974	22.7572193145752
1975	22.8012790679932
1976	22.7751293182373
1977	22.768669128418
1978	22.9745597839355
1979	23.3606796264648
1980	23.635570526123
1981	24.5026702880859
1982	25.7692699432373
1983	25.9702091217041
1984	25.9790706634521
1985	27.1767807006836
1986	28.1183700561523
1987	28.57666015625
1988	28.5170307159424
1989	28.2274703979492
1990	27.5361804962158
1991	27.6141605377197
1992	27.3903999328613
1993	27.1061496734619
1994	27.0317306518555
1995	27.6754894256592
1996	27.7505798339844
1997	27.901159286499
1998	28.178409576416
1999	28.2859001159668
2000	28.8859405517578
2001	29.6155796051025
2002	30.1879100799561
2003	31.6136493682861
2004	32.5094299316406
2005	32.9086608886719
2006	33.7307090759277
2007	33.8550910949707
2008	35.8400688171387
2009	37.5279083251953
2010	39.2984886169434
2011	40.2248611450195
2012	41.6648712158203
2013	43.2994613647461
2014	41.3771705627441
2015	42.0471115112305
2016	41.5114784240723
2017	42.218189239502
2018	42.7883911132812
2019	43.2456703186035
2020	43.8740615844727
2021	44.2548904418945
2022	44.1435394287109