Year	% gross
1971	0.689059972763062
1972	0.763350009918213
1973	0.725610017776489
1974	1.00926995277405
1975	1.28658998012543
1976	1.42329001426697
1977	1.50410997867584
1978	1.54852998256683
1979	1.61175000667572
1980	1.64638996124268
1981	1.76867997646332
1982	2.14475989341736
1983	1.82735002040863
1984	1.95013999938965
1985	2.22478008270264
1986	2.33531999588013
1987	2.72694993019104
1988	2.90644001960754
1989	3.29070997238159
1990	3.61461997032166
1991	3.92424011230469
1992	4.29666996002197
1993	4.86091995239258
2003	9.15097045898438
2004	10.4146299362183
2005	11.3175601959229
2006	12.5135898590088
2007	13.1897096633911
2009	18.0207004547119
2010	20.41921043396
2011	23.3923397064209
2012	26.3916301727295
2013	31.6296195983887
2014	38.798168182373
2015	43.9011917114258
2016	48.9958686828613
2017	51.1178207397461
2018	50.5418701171875
2019	46.3080902099609
2020	50.8860511779785
2022	46.9160003662109