Year	% gross
1970	53.4083213806152
1971	53.4786186218262
1972	55.6652412414551
1973	58.1813316345215
1974	59.6055908203125
1975	61.2004318237305
1976	62.6618003845215
1977	64.9311676025391
1978	67.2762680053711
1979	70.2189102172852
1980	72.1958236694336
1981	74.5858993530273
1982	76.4609069824219
1983	77.2614974975586
1984	76.9044876098633
1985	75.3530502319336
1986	73.5532684326172
1987	72.3394012451172
1988	72.9092025756836
1989	72.2081832885742
1990	71.6096420288086
1991	72.9305725097656
1992	73.3991394042969
1993	74.2699813842773
1994	74.850227355957
1995	75.2847900390625
1996	74.3114395141602
1997	76.9121475219727
1998	77.9143295288086
1999	78.321647644043
2000	80.4910125732422
2001	81.8724136352539
2002	84.8618698120117
2003	87.5462799072266
2004	89.9144897460938
2005	92.0842132568359
2006	93.1748504638672
2007	93.8935775756836
2008	94.353759765625
2009	94.9335403442383
2010	95.2015380859375
2011	95.585563659668
2012	96.2963027954102
2013	96.0397109985352
2014	95.8149337768555
2015	95.1483993530273
2016	95.6799087524414
2017	96.0785827636719
2018	97.2137908935547
2019	98.1447830200195
2020	98.6895065307617
2021	98.0896530151367
2022	98.1437683105469