Year	% gross
1970	19.0127105712891
1971	19.3701400756836
1972	19.8907299041748
1973	20.5509605407715
1974	21.0723705291748
1975	21.8295593261719
1976	22.2051792144775
1977	22.4620208740234
1978	23.0200595855713
1979	23.1286201477051
1980	24.3595104217529
1981	25.514720916748
1982	26.9774398803711
1983	28.9228496551514
1984	30.8028392791748
1985	32.1042709350586
1986	31.7379207611084
1987	32.0687789916992
1988	31.5141792297363
1989	30.9534397125244
1990	30.9741706848145
1991	32.1112785339355
1992	32.8964385986328
1993	32.2323799133301
1994	31.7716007232666
1995	31.4522705078125
1996	30.8983306884766
1997	30.5181293487549
1998	30.1499691009521
1999	29.7967090606689
2000	30.1001205444336
2001	31.0993595123291
2002	31.5907402038574
2003	32.4412002563477
2004	34.3723793029785
2005	34.6774215698242
2006	36.6789512634277
2007	37.3648796081543
2008	38.9378395080566
2009	40.244758605957
2010	41.9936408996582
2011	42.781421661377
2012	43.857738494873
2013	46.889820098877
2014	44.3298988342285
2015	45.5585289001465
2016	44.6335792541504
2017	44.5003318786621
2018	45.4465217590332
2019	46.8132400512695
2020	47.0543518066406
2021	47.1257019042969
2022	47.2688598632812