Year	% gross
1970	35.4175605773926
1971	37.6543617248535
1972	40.3581581115723
1973	42.7165985107422
1974	43.6860008239746
1975	44.1024017333984
1976	45.3662910461426
1977	46.831241607666
1978	46.6144905090332
1979	45.5859909057617
1980	44.0708999633789
1981	43.4523811340332
1982	42.9323196411133
1983	42.7132186889648
1984	43.4844093322754
1985	44.3423805236816
1986	45.2155685424805
1987	46.1900100708008
1988	46.8955307006836
1989	47.1336097717285
1990	47.9358596801758
1991	49.256160736084
1992	50.5127792358398
1993	51.6359786987305
1994	51.7896003723145
1995	52.3903884887695
1996	53.300609588623
1997	54.1036491394043
1998	54.438549041748
1999	54.5990180969238
2000	55.541919708252
2001	56.6245994567871
2002	58.5469703674316
2003	59.0170402526855
2004	60.3796882629395
2005	61.2177391052246
2006	61.7072296142578
2007	63.580940246582
2008	65.0484008789062
2009	65.8682327270508
2010	67.8339233398438
2011	69.1874008178711
2012	70.0247192382812
2013	70.7776184082031
2014	71.5754928588867
2015	71.6282501220703
2016	71.7705307006836
2017	71.4584121704102
2018	72.0363311767578
2019	72.3312225341797
2020	73.2041015625
2021	74.2958984375
2022	74.2153625488281