Year	% gross
1972	11.0370502471924
1973	11.5313997268677
1974	10.9452104568481
1975	12.1637897491455
1976	12.4919700622559
1977	13.6386404037476
1978	14.3988399505615
1979	14.5844202041626
1980	16.5131206512451
1981	16.8328304290771
1982	17.5372009277344
1983	17.3742008209229
1984	17.7898807525635
1985	17.6060390472412
1986	17.5813694000244
1987	18.1520004272461
1988	17.5798892974854
1989	17.041540145874
1990	17.1718692779541
1991	17.1753101348877
1992	19.0659103393555
1993	17.3065795898438
1994	15.2052803039551
1995	22.6534996032715
1996	23.4388198852539
1998	31.0771408081055
1999	36.0836601257324
2000	31.1816005706787
2001	32.6521911621094
2002	32.061580657959
2004	30.027530670166
2005	29.9272308349609
2006	31.8681392669678
2007	31.5720691680908
2008	34.0536804199219
2009	34.6426315307617
2010	34.8378486633301
2011	35.8270301818848
2012	35.7291717529297
2013	38.5908813476562
2014	40.0774307250977
2015	40.2343711853027
2016	38.2087783813477
2017	38.4798812866211
2018	38.4567909240723
2019	35.0998992919922
2021	35.5730018615723
2022	35.3279991149902