Year	% gross
1970	0.814880013465881
1971	0.879019975662231
1972	0.841579973697662
1973	0.973810017108917
1974	1.09235000610352
1976	0.807550013065338
1977	0.743430018424988
1978	0.759519994258881
1979	0.853579998016357
1980	0.896030008792877
1981	0.876869976520538
1983	1.09318995475769
1984	1.13106000423431
1985	1.1671199798584
1987	1.3218799829483
1989	1.3703099489212
2000	2.76514005661011
2001	2.83207011222839
2002	2.82814002037048
2004	2.91774988174438
2005	2.95904994010925
2009	3.97073006629944
2015	9.3003101348877
2016	11.7006797790527
2017	11.8862104415894
2018	18.0930004119873
2019	10.5694704055786
2020	19.3490009307861
2021	19.9850006103516
2022	20.4829998016357