Year	% gross
1970	2.65548992156982
1971	4.20981979370117
1972	5.41485023498535
1973	5.14345979690552
1974	5.96922016143799
1976	10.8330097198486
1977	12.5023498535156
1978	12.8522100448608
1980	10.9015398025513
1981	9.51498985290527
1998	76.8387832641602
1999	74.2559814453125
2001	78.994873046875
2007	97.3125381469727
2008	101.943840026855
2009	95.4395217895508
2010	93.3710632324219
2011	91.5310897827148
2012	98.517578125
2013	91.3752288818359
2014	90.0311508178711
2015	91.5793304443359
2016	55.6203651428223
2017	96.3239822387695
2018	98.9098129272461
2019	103.714752197266
2020	103.02808380127