Year	% gross
1970	33.0613594055176
1971	34.1390609741211
1972	36.3017807006836
1974	44.0137214660645
1979	55.0786018371582
1980	56.0900802612305
1981	59.238151550293
1982	60.0301284790039
1983	63.8785018920898
1984	66.7653503417969
1985	67.3655700683594
1986	70.2185668945312
1987	73.2411804199219
1988	72.1710662841797
1989	71.7791595458984
1990	70.7410888671875
1991	71.2994918823242
1992	72.9945831298828
1993	71.9543609619141
1994	72.4223098754883
1995	72.4645004272461
1997	73.9229507446289
1998	87.1962585449219
1999	85.6692428588867
2000	85.3236618041992
2001	83.6940536499023
2002	83.1941375732422
2003	89.3973007202148
2004	88.8102569580078
2005	82.2435302734375
2006	80.5829162597656
2007	78.1813888549805
2008	78.4677276611328
2009	78.2672424316406
2010	80.377799987793
2011	81.2581329345703
2012	84.1994323730469
2013	85.1464691162109
2014	89.1925201416016
2015	88.3539505004883
2016	86.6292495727539
2017	86.1777801513672
2018	82.911003112793
2019	83.5385894775391
2020	81.1649169921875
2021	82.3970031738281
2022	86.8280029296875