Year	% gross
1971	25.6091995239258
1972	26.8024005889893
1973	25.8399505615234
1974	24.7306995391846
1975	24.3103904724121
1976	33.8522109985352
1977	34.848690032959
1978	37.5943183898926
1979	38.3478202819824
1980	39.1597518920898
1985	28.2799797058105
1986	26.9299507141113
1987	26.3719005584717
1988	26.6035594940186
1989	27.4001502990723
1990	28.3724002838135
1991	29.6669502258301
1992	32.3524589538574
1993	34.7911987304688
1994	36.3416595458984
1995	38.1867980957031
1996	41.1573715209961
1997	44.0110282897949
1998	45.6464691162109
1999	54.045539855957
2000	55.3890419006348
2001	56.2208404541016
2002	59.4499015808105
2003	63.7387619018555
2004	65.7089691162109
2005	64.5728912353516
2006	62.6189498901367
2007	59.0538101196289
2008	55.1796913146973
2009	55.3321990966797
2010	58.0390586853027
2011	57.4648399353027
2012	53.9922218322754
2013	51.7453117370605
2014	51.4000205993652
2015	52.6677703857422
2016	53.8001098632812
2017	54.9715690612793
2018	56.2511901855469
2019	56.9276809692383
2020	59.3128089904785
2021	63.7670707702637
2022	62.3110809326172