Year	% gross
1970	24.5263500213623
1971	27.8338508605957
1972	30.9070796966553
1973	31.4087905883789
1976	52.9371185302734
1977	59.823371887207
1978	63.4453887939453
1979	65.6218795776367
1984	68.5203018188477
1985	78.2444915771484
1986	80.8986434936523
1988	83.4166030883789
1989	81.2448806762695
1990	83.0573272705078
1991	76.1983413696289
1992	87.4989929199219
1993	90.8226165771484
1994	91.7651062011719
1995	97.5640869140625
1996	99.2962112426758
1998	74.0486831665039
1999	77.3059310913086
2000	78.9241485595703
2002	77.6804122924805
2003	74.848503112793
2004	77.5244979858398
2005	82.1561584472656
2006	82.9626922607422
2007	85.7048568725586
2008	85.6677627563477
2009	88.6018295288086
2010	106.179580688477
2011	111.615676879883
2012	112.818641662598
2013	77.8807601928711
2014	80.7793426513672
2015	81.3991622924805
2016	81.4552612304688
2017	81.0007019042969
2018	81.398307800293
2019	83.9674911499023
2020	83.7505569458008