Year	% gross
1971	1.7265100479126
1972	1.80838000774384
1973	1.42620003223419
1974	1.76294994354248
1975	2.12945008277893
1976	2.31243991851807
1977	2.28082990646362
1978	2.41137003898621
1979	2.49899005889893
1980	2.53344011306763
1981	2.77395009994507
1982	2.93998003005981
1983	2.80200004577637
1984	2.96073007583618
1985	3.23849010467529
1986	3.44759011268616
1987	3.80818009376526
1988	3.98829007148743
1989	4.40410995483398
1990	4.72082996368408
1991	5.3340802192688
1992	5.6862998008728
1993	6.27830982208252
2001	9.63891983032227
2002	10.1557302474976
2003	10.493390083313
2004	12.0837802886963
2005	13.2845802307129
2006	14.6844301223755
2007	15.7173204421997
2009	21.4418697357178
2010	24.3956508636475
2011	27.5342102050781
2012	30.4175605773926
2013	35.2159614562988
2014	41.4826889038086
2015	45.2864799499512
2016	48.9952812194824
2017	49.8075103759766
2018	47.8539505004883
2019	43.208080291748
2020	46.391471862793
2022	41.984001159668