Year	% gross
1970	32.1299896240234
1971	32.1322708129883
1972	32.8013801574707
1973	33.4230613708496
1974	33.8958892822266
1975	34.3979415893555
1976	35.0692405700684
1977	36.2628402709961
1978	37.0626907348633
1979	38.096248626709
1980	39.3327713012695
1981	40.0691108703613
1982	41.8073692321777
1983	43.1579093933105
1984	44.8254508972168
1985	45.984001159668
1986	46.9389190673828
1987	47.4679107666016
1988	47.6366004943848
1989	47.7386589050293
1990	48.8370704650879
1991	50.1153717041016
1992	51.2957191467285
1993	52.5262603759766
1994	52.9779090881348
1995	53.4625396728516
1996	53.737491607666
1997	54.1296081542969
1998	53.5866508483887
1999	53.038028717041
2000	54.2112998962402
2001	54.897029876709
2002	56.0812606811523
2003	56.9157218933105
2004	58.0275611877441
2005	58.7106018066406
2006	59.7443695068359
2007	61.180248260498
2008	62.266429901123
2009	62.1224212646484
2010	64.1735992431641
2011	66.2321624755859
2012	67.9300079345703
2013	68.2020568847656
2014	70.76806640625
2015	71.4638214111328
2016	72.3073196411133
2017	71.949951171875
2018	72.8565216064453
2019	73.1354598999023
2020	74.4763717651367
2021	76.1027908325195
2022	75.9207382202148