Year	% gross
1970	30.5074291229248
1971	32.4638900756836
1972	34.8328704833984
1973	36.9095802307129
1974	37.9178886413574
1975	38.4127616882324
1976	39.5049209594727
1977	40.8387107849121
1978	40.9294395446777
1979	39.9308013916016
1980	38.4074592590332
1981	37.6967887878418
1982	37.1782684326172
1983	37.2784194946289
1984	37.7457504272461
1985	38.7030906677246
1986	39.6753997802734
1987	40.8058815002441
1988	41.5652809143066
1989	41.9557189941406
1990	42.7677001953125
1991	44.1244316101074
1992	45.4676094055176
1993	46.6484107971191
1994	47.2308387756348
1995	48.0730590820312
1996	49.160099029541
1997	50.221981048584
1998	50.9352493286133
1999	51.4598083496094
2000	52.5277900695801
2001	53.728199005127
2002	55.8739395141602
2003	56.8035507202148
2004	58.1473503112793
2005	59.206428527832
2006	59.8232307434082
2007	61.8696212768555
2008	63.5378303527832
2009	64.7045364379883
2010	66.4526062011719
2011	67.9106674194336
2012	68.8627319335938
2013	70.0487976074219
2014	71.0009078979492
2015	71.0337219238281
2016	71.2420883178711
2017	70.8916778564453
2018	71.5681304931641
2019	71.9089431762695
2020	72.607177734375
2021	73.4654312133789
2022	73.6673202514648