Year	% gross
1971	4.76875019073486
1972	5.46279001235962
1973	6.21203994750977
1974	6.91336011886597
1975	7.56554985046387
1976	8.52110958099365
1977	9.71102046966553
1978	10.6843099594116
1979	11.3644304275513
1980	11.9058904647827
1981	12.566650390625
1982	13.135479927063
1983	14.2112102508545
1984	15.2485799789429
1985	16.6874809265137
1986	17.1225204467773
1987	18.9692192077637
1988	20.0057201385498
1989	20.7035102844238
1990	21.0187892913818
1991	22.780309677124
1992	23.5931491851807
1995	21.1303691864014
1997	21.5346393585205
1998	21.0355606079102
1999	24.1213207244873
2001	29.3841495513916
2002	21.7950305938721
2003	27.4623394012451
2004	23.6219997406006
2005	24.0521602630615
2006	20.9986305236816
2007	28.4457492828369
2008	32.7517585754395
2009	37.0349311828613
2010	39.2179985046387
2011	44.6354904174805
2012	47.8828392028809
2013	49.5467796325684
2014	53.2530708312988
2015	54.668701171875
2016	55.6071701049805
2017	46.8409996032715
2018	42.939998626709
2019	41.0579986572266
2020	41.9790000915527
2021	42.1441116333008
2022	42.768009185791