Year	% gross
1975	53.7805099487305
1976	55.7810592651367
1977	56.5939102172852
1978	53.8450508117676
1979	49.7343711853027
1980	44.330249786377
1981	42.0627899169922
1982	38.887580871582
1983	36.9418411254883
1984	36.6887512207031
1985	38.1397018432617
1986	39.701171875
1987	42.0370407104492
1988	43.9102210998535
1989	44.6455497741699
1990	44.8944702148438
1991	46.8479385375977
1992	48.8251686096191
1993	50.572639465332
1994	50.351978302002
1995	51.961368560791
1996	54.6081581115723
1997	56.8037185668945
1998	58.2426490783691
1999	59.4393081665039
2000	60.0625610351562
2001	61.9978790283203
2002	62.8280982971191
2003	64.1160202026367
2004	66.5905609130859
2005	68.4516220092773
2006	70.5916366577148
2007	74.1222991943359
2008	76.6831512451172
2009	80.68701171875
2010	83.3522796630859
2011	84.5693511962891
2012	84.8789901733398
2013	86.0024032592773
2014	85.048713684082
2015	85.202766418457
2016	84.2925567626953
2017	84.4470672607422
2018	85.0156326293945
2019	86.5467910766602
2020	87.5255508422852
2021	88.2621688842773
2022	88.8097305297852