Year	% gross
1971	25.1642799377441
1972	27.993860244751
1980	43.6473999023438
1981	46.5168914794922
1982	48.4100112915039
1983	49.3684501647949
1984	51.0398788452148
1985	52.7095489501953
1986	53.4960098266602
1987	54.0289115905762
1988	54.9560699462891
1989	55.1139907836914
1990	56.0783004760742
1991	58.0025901794434
1992	48.070369720459
1993	35.8026504516602
1994	35.8579711914063
1995	36.9298095703125
1996	39.8935394287109
1997	40.9569206237793
1998	40.5264587402344
1999	42.3108596801758
2000	44.1325302124023
2001	45.2344207763672
2002	44.7948684692383
2003	48.3376083374023
2004	49.6625213623047
2005	51.289981842041
2006	53.768741607666
2007	54.8386611938477
2008	58.6095581054688
2009	61.7182502746582
2010	65.0385513305664
2011	70.003303527832
2012	77.3268814086914
2013	81.5583419799805
2014	83.3500518798828
2015	86.4182510375977
2016	87.6822662353516
2017	83.8200836181641
2018	80.4987335205078
2019	75.7549896240234
2020	75.1401824951172
2021	69.2341995239258