Year	% gross
1970	35.0590591430664
1971	36.3079299926758
1972	38.1788101196289
1973	40.0541191101074
1974	41.4054908752441
1975	42.1017112731934
1976	42.8634490966797
1977	43.7089614868164
1978	43.8650512695312
1979	42.7257385253906
1980	41.8593292236328
1981	41.1099014282227
1982	40.7208290100098
1983	41.0107002258301
1984	41.0770111083984
1985	41.8257789611816
1986	42.8278388977051
1987	43.9316101074219
1988	44.5307502746582
1989	44.944450378418
1990	45.5872192382812
1991	46.8301391601562
1992	48.0994911193848
1993	49.3399696350098
1994	50.3368797302246
1995	51.1912612915039
1996	52.1755218505859
1997	53.1974411010742
1998	53.9609909057617
1999	54.6722602844238
2000	55.6958885192871
2001	56.8595008850098
2002	58.9178085327148
2003	60.1078910827637
2004	61.1598205566406
2005	62.3762397766113
2006	63.0208587646484
2007	64.9790573120117
2008	66.6968612670898
2009	68.0745468139648
2010	69.4598617553711
2011	70.7706069946289
2012	71.6841583251953
2013	73.5107574462891
2014	74.4903411865234
2015	74.4753799438477
2016	74.6265335083008
2017	74.2452926635742
2018	74.8774032592773
2019	75.2002410888672
2020	75.6512680053711
2021	76.2446517944336
2022	76.751838684082