Year	% gross
1971	3.10620999336243
1976	4.52826023101807
1977	4.73298978805542
1978	4.97173976898193
1979	6.17520999908447
1980	6.61464023590088
1981	7.1925802230835
1983	6.51831007003784
1984	8.85379981994629
1985	10.680100440979
1986	10.77476978302
1987	12.0455904006958
1988	12.0003995895386
1989	12.0214500427246
1990	11.9412698745728
1991	11.8104696273804
1992	11.4976997375488
1994	10.5094203948975
1995	10.3056898117065
1997	9.63930034637451
1998	9.84251022338867
1999	10.6554899215698
2000	12.6264200210571
2001	12.9086198806763
2002	13.2622900009155
2003	13.634220123291
2004	16.8420104980469
2005	18.2259902954102
2006	17.9448509216309
2007	19.3625507354736
2008	22.8495807647705
2009	24.1935195922852
2010	25.7541904449463
2011	27.050760269165
2012	30.076810836792
2014	34.2740592956543
2015	37.3567581176758
2016	39.000358581543
2017	36.1769981384277
2018	34.7994804382324
2019	35.9930114746094