Year	% gross
1970	4.96179008483887
1971	5.02904987335205
1972	5.20143985748291
1973	5.4213399887085
1974	5.63741016387939
1975	5.89815998077393
1976	6.11569023132324
1977	6.15594005584717
1978	6.3951301574707
1979	6.64117002487183
1980	6.85516023635864
1981	7.21293020248413
1982	7.2487998008728
1983	7.70468997955322
1984	8.23668956756592
1985	8.44314002990723
1986	8.59323024749756
1987	8.85715007781982
1988	8.53911972045898
1989	8.75524997711182
1990	8.86200046539307
1991	9.05045986175537
1992	9.10393047332764
1993	9.22677040100098
1994	9.49394035339355
1995	9.72021007537842
1996	10.3915300369263
1997	10.9115200042725
1998	11.6273202896118
1999	12.5483598709106
2000	13.14564037323
2001	13.4716196060181
2002	13.9386100769043
2003	14.4004802703857
2004	14.8329696655273
2005	15.1266498565674
2006	15.925950050354
2007	17.2068691253662
2008	18.8026504516602
2009	19.8892498016357
2010	21.5037002563477
2011	24.0579700469971
2012	25.5795707702637
2013	26.0496292114258
2014	27.3392505645752
2015	28.7968997955322
2016	29.5941295623779
2017	30.1421394348145
2018	30.482629776001
2019	31.3700199127197
2020	32.0215492248535
2021	33.1958084106445
2022	33.743278503418