Year	% gross
1970	31.3981094360352
1971	33.4971313476562
1972	36.0348510742188
1973	38.2716217041016
1974	39.3857688903809
1975	39.8781204223633
1976	40.9719085693359
1977	42.2741088867188
1978	42.242748260498
1979	41.1061782836914
1980	39.434211730957
1981	38.6439399719238
1982	38.0481910705566
1983	38.144718170166
1984	38.6709213256836
1985	39.731128692627
1986	40.8086395263672
1987	42.0538787841797
1988	42.8928718566895
1989	43.3806610107422
1990	44.3229217529297
1991	45.8259391784668
1992	47.3412895202637
1993	48.6620483398438
1994	49.2925910949707
1995	50.1610794067383
1996	51.3558883666992
1997	52.4935493469238
1998	53.208179473877
1999	53.7695808410645
2000	54.9257698059082
2001	56.1983985900879
2002	58.5105400085449
2003	59.4672813415527
2004	60.8830184936523
2005	62.0342712402344
2006	62.6492614746094
2007	64.9149703979492
2008	66.6902236938477
2009	67.9656829833984
2010	69.8965530395508
2011	71.5111694335938
2012	72.5644226074219
2013	74.0883102416992
2014	75.1626129150391
2015	75.2958984375
2016	75.5756683349609
2017	75.1958312988281
2018	76.0139617919922
2019	76.5161666870117
2020	77.4139862060547
2021	78.4537582397461
2022	78.8007278442383