Year	% gross
1971	26.7505302429199
1972	26.9774303436279
1973	27.9610500335693
1974	28.366060256958
1975	28.4169998168945
1976	27.0793495178223
1977	25.5071201324463
1978	28.8077507019043
1979	28.8914794921875
1980	28.7388591766357
1981	29.8652191162109
1982	31.9978294372559
1983	33.3888893127441
1984	34.4998016357422
1985	34.1719703674316
1986	36.3683586120605
1987	36.9232406616211
1988	36.8872718811035
1989	35.976318359375
1990	34.7086410522461
1991	31.4762191772461
1992	31.2163200378418
1993	31.1528701782227
1994	32.3943710327148
1995	34.4768486022949
1996	35.0576782226562
1997	34.9311218261719
1998	34.4295806884766
1999	34.6019706726074
2000	33.9336814880371
2001	37.0106506347656
2002	38.098388671875
2003	39.3689308166504
2004	41.022159576416
2005	42.209171295166
2006	44.1818389892578
2007	45.777458190918
2008	52.9267082214355
2009	50.7389907836914
2011	53.4614181518555
2012	55.2710494995117
2013	55.0102882385254
2014	56.0690116882324
2015	55.2973518371582
2016	54.598258972168
2017	55.0050315856934
2018	56.2277412414551
2019	61.5071296691895
2020	61.9247207641602
2021	63.0205497741699
2022	64.3954010009766