Year	% gross
1971	5.12973022460938
1973	10.1525897979736
1981	37.2897300720215
1986	44.2244300842285
1987	41.9734382629395
1999	35.6772994995117
2002	39.6874008178711
2003	43.7668685913086
2004	49.2040405273438
2013	57.9466781616211
2014	58.437801361084
2017	55.303409576416
2018	60.7714309692383