Year	% gross
1970	5.41429996490479
1971	5.41623020172119
1972	5.80010986328125
1973	6.29850006103516
1974	6.73581981658936
1975	7.355140209198
1976	8.10776042938232
1977	8.85892009735107
1978	9.33339023590088
1979	9.48528003692627
1980	9.98987007141113
1981	10.6250200271606
1982	11.0282697677612
1983	11.2612400054932
1984	11.6253995895386
1985	11.6372098922729
1986	12.0515604019165
1987	12.2677001953125
1988	12.4779300689697
1989	12.2814798355103
1990	12.3913202285767
1991	12.1884202957153
1992	12.8985204696655
1993	13.7657098770142
1994	14.4077796936035
1995	15.223349571228
1996	16.4956893920898
1997	17.4048309326172
1998	18.1688709259033
1999	19.2615394592285
2000	19.4384002685547
2001	19.9842700958252
2002	20.3612003326416
2003	20.5200290679932
2004	21.8486003875732
2005	22.9581508636475
2006	23.9523391723633
2007	25.6398105621338
2008	27.8493003845215
2009	28.5195999145508
2010	30.1957893371582
2011	30.4230098724365
2012	32.216178894043
2013	33.4697608947754
2014	35.829460144043
2015	38.1515808105469
2016	37.5415916442871
2017	37.9015083312988
2018	38.3323097229004
2019	38.4870681762695
2020	38.5958290100098
2021	38.6276016235352
2022	38.7428283691406