Year	% gross
1971	8.32052993774414
1972	8.77972030639648
1976	14.0807399749756
1977	15.9690799713135
1978	18.2399597167969
1979	20.9367198944092
1981	24.7594108581543
1982	29.4557399749756
1983	30.7097301483154
1984	33.6894187927246
1985	34.9333381652832
1986	37.7136993408203
1987	38.9871597290039
1988	40.6819801330566
1989	39.8348388671875
1990	38.3652114868164
1991	40.8739013671875
1992	45.7564010620117
1993	53.256649017334
1994	59.2986106872559
1995	63.0218391418457
1996	67.4257125854492
1997	72.8642425537109
1998	76.2130508422852
1999	78.7255401611328
2000	78.1259536743164
2001	76.2547988891602
2002	77.9129104614258
2003	80.3038787841797
2004	86.9015884399414
2005	88.0804977416992
2006	90.9726409912109
2007	93.5457000732422
2008	91.0489196777344
2009	97.0245819091797
2010	97.8492965698242
2011	95.9044494628906
2012	95.118766784668
2013	93.3453903198242
2014	94.3580627441406
2015	97.3371734619141
2016	90.2180404663086
2017	89.9686737060547
2018	92.5458679199219
2019	93.4494705200195
2020	89.6888275146484