Year	% gross
1977	20.1614303588867
1979	26.7838191986084
1980	36.430290222168
1981	35.9769706726074
1985	34.6510581970215
1986	36.9951782226563
1996	36.1297416687012
1997	39.1837997436523
1998	41.9379615783691
1999	39.345588684082
2000	40.3233604431152
2001	42.6865615844727
2002	45.3406791687012
2003	48.6252593994141
2004	54.1903305053711
2005	57.6729316711426
2006	58.9091491699219
2007	61.7157897949219
2008	68.7524719238281
2009	68.6510925292969
2010	70.2557220458984
2011	71.9985885620117
2012	77.2389526367188
2013	79.6277236938477
2014	81.0197296142578
2015	83.3065338134766
2016	86.3796463012695
2017	95.6135101318359
2018	99.6856536865234
2019	97.0831985473633
2020	94.14013671875
2021	93.8917236328125