Year	% gross
1970	2.04375004768372
1972	2.22625994682312
1973	2.21124005317688
1974	2.77257990837097
1976	2.22503995895386
1977	2.49397993087769
1978	2.07190990447998
1979	3.06245994567871
1980	3.10870003700256
1981	3.10770010948181
1982	3.82046008110046
1983	4.85226011276245
1984	5.34712982177734
1985	5.48542022705078
1986	5.3514199256897
1987	4.60726976394653
1988	3.9222400188446
1989	3.82814002037048
1990	4.32926988601685
1999	5.47931003570557
2000	5.46036005020142
2001	6.42439985275269
2002	6.13536977767944
2003	6.19688987731934
2004	5.72883987426758
2005	6.29582977294922
2006	7.24171018600464
2007	7.86712980270386
2008	8.84245014190674
2009	10.8163499832153
2011	13.5719995498657
2012	13.6680002212524
2013	13.6510000228882
2014	13.6529998779297
2015	15.5909996032715
2016	17.4020004272461
2017	18.5310001373291
2018	19.7029991149902
2019	22.8050003051758
2020	22.5389995574951
2021	23.3999996185303
2022	22.8400001525879