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australia 160 230 290 230 200 200 200 57300 58000 58000 58000 58000
in 2000 , did world mine production according to usgs estimates produce more tons or less tons of output of niobium minerals than in 2002 , when a total of 29,900 tons was estimated to have been mined ?
IN CD , VBD-AUX NN NN NN VBG TO NNP VBZ VB JJR NNS CC JJR NNS IN NN IN NNP NNS IN IN CD , WRB DT NN IN CD NNS VBD-AUX VBN TO VBD-AUX VBD-AUX VBN .
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select ( select c2_number from w where c1 = 'world' ) > 29900