Year	% gross
1970	11.5671396255493
1971	11.3865003585815
1972	11.5924196243286
1973	11.7334098815918
1974	11.9149198532104
1975	12.3439102172852
1976	13.0095701217651
1977	12.9145803451538
1978	13.1401100158691
1979	13.4337396621704
1980	13.8429403305054
1981	14.203049659729
1982	14.0893201828003
1983	14.1051301956177
1984	14.0905103683472
1985	13.9361295700073
1986	14.16748046875
1987	14.3768501281738
1988	14.1795701980591
1989	14.2258996963501
1990	14.2732496261597
1991	14.3543500900269
1992	14.4958095550537
1993	14.8403701782227
1994	15.4682903289795
1995	15.9286203384399
1996	16.6557998657227
1997	17.2674198150635
1998	17.6699905395508
1999	18.4286594390869
2000	19.1103000640869
2001	19.927339553833
2002	20.8710899353027
2003	21.9744491577148
2004	22.7674007415771
2005	23.433349609375
2006	24.2590808868408
2007	25.1136894226074
2008	26.0702095031738
2009	26.9039897918701
2010	28.2223796844482
2011	29.8653793334961
2012	30.8725299835205
2013	31.4518394470215
2014	33.6915016174316
2015	34.7120895385742
2016	35.0789909362793
2017	35.3429183959961
2018	35.554271697998
2019	36.1400184631348
2020	37.0094718933105
2021	38.1636695861816
2022	39.1117897033691