Year	% gross
1970	7.19454002380371
1971	7.18441009521484
1972	7.26183986663818
1973	7.35780000686646
1974	7.38492012023926
1975	7.35705995559692
1976	7.43804979324341
1977	7.44938993453979
1978	7.72770977020264
1979	7.93266010284424
1980	8.08150959014893
1981	8.38187026977539
1982	8.24475955963135
1983	8.82660961151123
1984	9.23122978210449
1985	9.07964992523193
1986	9.1220703125
1987	9.31134986877441
1988	8.71677017211914
1989	8.79870986938477
1990	8.83131980895996
1991	8.75625038146973
1992	8.6128396987915
1993	8.62421035766602
1994	8.57853031158447
1995	8.67644023895264
1996	9.34323024749756
1997	9.7531099319458
1998	10.5094900131226
1999	11.2466602325439
2000	11.9139604568481
2001	12.2623996734619
2002	12.555290222168
2003	12.9260997772217
2004	13.5047302246094
2005	13.6700401306152
2006	14.2344999313354
2007	15.6631097793579
2008	17.0204696655273
2009	17.9119300842285
2010	19.2920207977295
2011	21.8500499725342
2012	22.4765796661377
2013	22.0798892974854
2014	22.9564304351807
2015	23.8685207366943
2016	23.6846809387207
2017	23.6717700958252
2018	23.6052207946777
2019	23.9674301147461
2020	24.3961696624756
2021	25.3765907287598
2022	26.1727905273438