Year	% gross
1971	38.1743316650391
1972	32.2040481567383
1973	29.7999992370605
1974	26.4323997497559
1975	25.4969005584717
1976	27.5905303955078
1977	27.7058906555176
1978	29.5130500793457
1979	33.1256408691406
1980	36.4233818054199
1981	42.571590423584
1982	48.2610397338867
1983	55.5287818908691
1984	59.589038848877
1985	64.9437408447266
1986	70.4528427124023
1987	58.6812515258789
1988	60.9931488037109
1989	60.9173316955566
1990	62.4064102172852
1991	65.024543762207
1992	67.9395980834961
1993	78.3251190185547
1994	83.6497116088867
1995	88.3711318969727
1996	91.1939468383789
1998	84.1438522338867
1999	80.229362487793
2000	83.3154907226562
2001	79.4369964599609
2002	78.7470474243164
2003	79.5155487060547
2004	81.5305099487305
2005	80.6130599975586
2006	83.1029815673828
2007	84.6418228149414
2008	93.4866180419922
2009	95.1000137329102
2010	96.9701995849609
2011	96.3498611450195
2012	94.982536315918
2013	94.7297897338867
2014	100.880218505859
2015	101.110336303711
2016	94.3007202148438
2017	101.844268798828
2018	103.255599975586
2019	107.993560791016
2020	108.615440368652