[['country', '2002', '2003', '2004', '2005', '2006', '2007', '2008', '2009', '2010', '2011'], ['chile', '4580', '4860', '5410', '5320', '5560', '5700', '5330', '5320', '5420', '5420'], ['peru', '843', '850', '1040', '1090', '1049', '1200', '1270', '1260', '1250', '1220'], ['united states', '1140', '1120', '1160', '1150', '1200', '1190', '1310', '1190', '1110', '1120'], ['china', '585', '565', '620', '640', '890', '920', '950', '960', '1190', '1190'], ['australia', '873', '870', '854', '930', '859', '860', '886', '900', '870', '940'], ['indonesia', '1160', '1170', '840', '1050', '816', '780', '651', '950', '872', '625'], ['russia', '695', '700', '675', '675', '725', '730', '750', '750', '703', '710'], ['canada', '600', '580', '546', '580', '607', '585', '607', '520', '525', '550'], ['zambia', '330', '330', '427', '450', '476', '530', '546', '655', '690', '715'], ['poland', '503', '500', '531', '530', '512', '470', '430', '440', '425', '425'], ['kazakhstan', '490', '480', '461', '400', '457', '460', '420', '410', '380', '360'], ['mexico', '330', '330', '406', '420', '338', '400', '247', '250', '260', '365'], ['other countries', '1500', '1500', '1610', '1750', '1835', '1800', '2030', '2180', '1900', '2000'], ['world', '13600', '13900', '14600', '14900', '15100', '15600', '15400', '15800', '15900', '16100']]
Zambia and Mexico had the same Peak Copper in 2002
[ENT] and [ENT] had the same [ENT] in [ENT]