The currencies of oil-producing countries tumbled against the dollar on Monday as crude oil prices continued to fall amid aftershocks from the most recent meeting of the Organization of the Petroleum Exporting Countries. Oil-price declines have pummeled such currencies as the Canadian dollar, Colombian peso, Norwegian krone and the Russian ruble. The Canadian dollar fell 1.1% in late-afternoon trade, on track to reach a new 11-year low against the U.S. currency, as one U.S. dollar bought C$1.3514. The Colombian peso stumbled 3.2%, heading toward an all-time low closing value against the dollar at 3308.3 pesos. The Norwegian krone slid 1.9% to 8.6665 per dollar, still near its weakest level in more than 13 years. The Russian ruble plummeted 2.2% against the dollar to 69.62 rubles, on pace for the lowest close since Aug. 24. Oil-producers’ currencies declined as crude prices fell near seven-year lows as investors continued to wrestle with OPEC’s decision to maintain current production levels in an oversupplied market.