Year	% gross
1970	5.86393022537231
1971	5.87080001831055
1972	5.93215990066528
1973	6.03820991516113
1974	6.21709012985229
1975	6.45925998687744
1976	6.72237014770508
1977	6.84795999526978
1978	7.04591989517212
1979	7.42182016372681
1980	7.73746013641357
1981	8.01863956451416
1982	7.99149990081787
1983	8.03462028503418
1984	8.08981037139893
1985	8.08378982543945
1986	8.31134033203125
1987	8.47776985168457
1988	8.32419013977051
1989	8.37913990020752
1990	8.42444038391113
1991	8.45936012268066
1992	8.46767997741699
1993	8.57999992370605
1994	9.0272798538208
1995	9.48318958282471
1996	10.2017803192139
1997	10.9123296737671
1998	11.6660900115967
1999	12.5165004730225
2000	13.3213195800781
2001	14.2099304199219
2002	15.3504104614258
2003	16.4827098846436
2004	17.3991107940674
2005	18.249719619751
2006	19.3810195922852
2007	20.4003601074219
2008	21.5685501098633
2009	22.5155696868896
2010	23.8770503997803
2011	25.6037197113037
2012	26.8789100646973
2013	27.7383308410645
2014	30.4434604644775
2015	31.6328601837158
2016	32.2094306945801
2017	32.6133003234863
2018	33.0337181091309
2019	33.9015007019043
2020	34.9937705993652
2021	36.3748016357422
2022	37.2648582458496