series_type,table_type,table_type_desc,country_code,country_type,country_english_name,year,period_type,period_number,period,period_in_date,trade_flow,trade_flow_desc,commodity_group_code,commodity_group_name,partner_country_code,partner_country_english_name,base_year,currency_type,value,value_unit,value_type,value_type_desc,estimation_type,estimation_type_desc