Year	% gross
1970	7.49773979187012
1971	7.44470977783203
1972	7.91092014312744
1973	8.54162979125977
1974	9.06297969818115
1975	9.81029987335205
1976	10.7227401733398
1977	11.7656202316284
1978	12.3050699234009
1979	12.333399772644
1980	12.8186101913452
1981	13.4603595733643
1982	13.9658603668213
1983	14.2149496078491
1984	14.5793895721436
1985	14.5304298400879
1986	15.1097602844238
1987	15.3228797912598
1988	15.1409997940063
1989	14.7313404083252
1990	14.6644201278687
1991	14.3735303878784
1992	15.1234998703003
1993	15.9977903366089
1994	16.6010398864746
1995	17.4028701782227
1996	18.6322994232178
1997	19.320930480957
1998	19.7589092254639
1999	20.711540222168
2000	20.713399887085
2001	21.1168193817139
2002	21.3638191223145
2003	21.3207397460938
2004	22.7739791870117
2005	23.7191009521484
2006	24.1553192138672
2007	25.7412891387939
2008	26.5297603607178
2009	27.3283405303955
2010	29.3347797393799
2011	29.9276695251465
2012	32.2062911987305
2013	34.2078514099121
2014	36.9011001586914
2015	39.0756797790527
2016	38.2802085876465
2017	39.0395889282227
2018	38.7454414367676
2019	38.9766387939453
2020	38.9537086486816
2021	39.3567504882812
2022	39.2633781433105