Year	% gross
1970	2.76640009880066
1972	2.70325994491577
1973	2.64127993583679
1974	2.56462001800537
1975	2.57087993621826
1976	2.61133003234863
1977	2.31589007377625
1978	2.4575400352478
1979	2.35958003997803
1980	3.38935995101929
1981	3.86744999885559
1982	3.88013005256653
1983	4.08438014984131
1984	5.33847999572754
1985	6.10876989364624
1986	6.35422992706299
1987	7.54273986816406
1988	6.83737993240356
1989	7.92065000534058
1990	8.38504981994629
1991	8.65165042877197
1992	9.49180030822754
1993	9.4519100189209
1994	10.6053104400635
1995	11.4058303833008
1996	11.616530418396
1997	13.460280418396
1998	13.4271001815796
1999	14.7992601394653
2000	14.9254198074341
2001	14.2340402603149
2002	14.8015203475952
2003	15.9035701751709
2004	16.3212699890137
2005	16.8704605102539
2006	16.9588603973389
2007	17.7960300445557
2008	20.8093490600586
2009	23.0492897033691
2010	23.8078193664551
2011	25.4599494934082
2012	29.5658397674561
2013	30.438570022583
2014	30.5253391265869
2015	33.0326499938965
2016	35.4757499694824
2017	36.633861541748
2018	36.7954597473145
2019	37.9259986877441
2020	38.6500015258789
2021	41.0019989013672
2022	42.633171081543