Year	% gross
1971	32.7306709289551
1972	33.0955810546875
1973	33.4580612182617
1975	33.939769744873
1976	34.1593399047852
1977	34.8136405944824
1978	35.1909294128418
1980	37.9076614379883
1981	39.4611511230469
1982	41.5161781311035
1983	42.556999206543
1984	45.2912216186523
1986	47.2444114685059
1987	46.578369140625
1988	46.2860298156738
1989	46.1529884338379
1993	54.8502006530762
1994	54.8238792419434
1995	54.6585083007812
1996	54.4674110412598
1997	54.463550567627
1999	50.0420608520508
2000	51.9415397644043
2001	55.6519813537598
2002	56.2789611816406
2003	57.3487396240234
2004	59.2454490661621
2005	61.6847801208496
2006	62.2938690185547
2007	64.0213928222656
2008	66.5057983398438
2009	64.3798599243164
2010	67.8147277832031
2011	70.6106719970703
2012	72.4955825805664
2013	70.1685028076172
2014	75.4331970214844
2015	75.137077331543
2016	76.2066497802734
2017	74.9858627319336
2018	76.1687469482422
2019	75.7184829711914
2020	75.7350006103516
2021	79.6480026245117
2022	79.1370010375977
2023	76.3399963378906