Year	% gross
1973	6.3476300239563
1974	6.57799005508423
1975	6.91097021102905
1976	7.32463979721069
1977	7.55241012573242
1978	7.78578996658325
1979	8.51599025726318
1980	9.12716007232666
1981	9.59337043762207
1982	9.46759033203125
1983	9.11446952819824
1984	8.67961025238037
1985	8.52795028686523
1986	9.01317024230957
1987	9.23346996307373
1988	9.22556018829346
1989	9.09370994567871
1990	9.05313014984131
1991	8.94377994537354
1992	8.87884998321533
1993	9.01504993438721
1994	9.88667964935303
1995	10.7773704528809
1996	11.7049999237061
1997	12.7950601577759
1998	13.7887096405029
1999	14.5978097915649
2000	15.7054300308228
2001	17.4102993011475
2002	19.5696601867676
2003	21.8678398132324
2004	23.3871192932129
2005	25.1415100097656
2006	26.608190536499
2007	27.1008701324463
2008	27.5575504302979
2009	28.2567501068115
2010	29.7111701965332
2011	31.0051307678223
2012	32.8189582824707
2013	35.0688285827637
2014	41.7174606323242
2015	43.6800804138184
2016	44.5736999511719
2017	45.6982917785645
2018	47.0631294250488
2019	48.979419708252
2020	52.4342002868652
2021	56.211368560791
2022	59.3834609985352