Year	% gross
1970	6.07791996002197
1971	6.07159996032715
1972	6.1382098197937
1973	6.27533006668091
1974	6.56544017791748
1975	7.00315999984741
1976	7.43517017364502
1977	7.6077299118042
1978	7.79150009155273
1979	8.38665008544922
1980	8.97369003295898
1981	9.30897045135498
1982	9.21510028839111
1983	8.93251037597656
1984	8.74810028076172
1985	8.75290966033936
1986	9.16917037963867
1987	9.42901992797852
1988	9.38189029693604
1989	9.39076042175293
1990	9.43025970458984
1991	9.46595001220703
1992	9.57435035705566
1993	9.74263000488281
1994	10.6688995361328
1995	11.5248699188232
1996	12.4402198791504
1997	13.6389303207397
1998	14.6671800613403
1999	15.7611598968506
2000	16.8624000549316
2001	18.2293605804443
2002	20.2829494476318
2003	22.5120105743408
2004	24.1150894165039
2005	25.5699996948242
2006	27.3729000091553
2007	28.2819404602051
2008	29.2975997924805
2009	30.4989891052246
2010	32.2905197143555
2011	33.8938217163086
2012	36.1951904296875
2013	38.6966094970703
2014	44.8050308227539
2015	47.396240234375
2016	49.4471817016602
2017	50.9999504089355
2018	52.5559310913086
2019	54.5577011108398
2020	57.5182189941406
2021	60.6413497924805
2022	62.8271102905273