Year	% gross
1971	0.982100009918213
1972	1.06762003898621
1973	1.21531999111176
1975	1.32880997657776
1976	1.15705001354218
1977	1.51398003101349
1978	1.7746000289917
1979	1.98492002487183
1980	2.72238993644714
1981	2.6256000995636
1982	3.39074993133545
1983	3.58770990371704
1984	3.65974998474121
1985	3.9262900352478
1986	3.86001992225647
1987	3.41654992103577
1988	3.40078997612
1989	3.32632994651794
1990	3.19558000564575
1991	2.96386003494263
1993	3.2834300994873
1994	2.68184995651245
1995	2.18304991722107
1996	2.04844999313354
1997	1.85629999637604
1998	2.09190011024475
1999	2.05018997192383
2000	2.09302997589111
2001	1.96777999401093
2002	2.00627994537354
2003	2.1826798915863
2004	2.52886009216309
2005	2.6235499382019
2006	2.80920004844666
2007	3.18492007255554
2008	3.26848006248474
2009	3.46869993209839
2010	3.62473011016846
2011	4.00945997238159
2012	4.07020998001099
2013	4.21469020843506
2014	4.73074007034302
2015	4.72751998901367
2016	4.76165008544922
2017	5.23624992370605
2018	5.32438993453979
2019	5.53402996063232
2020	5.67685985565186
2021	5.58199977874756
2022	6.15096998214722