With its cash reserves in sharp decline, Venezuela withdrew 460 million US dollars from the International Monetary Fund last month in its third such operation this year. According to IMF website, Venezuela exchanged part of its Special Drawing Rights (SDR) — an international reserve asset created by the IMF.IMF said, some countries often buy SDRs to comply with their obligations at the IMF, and in other cases sell them for hard currency to raise their reserve level at home.Venezuela depends almost exclusively on oil exports and has taken a big hit from a drop in crude prices. Its hard currency reserves have fallen 25 per cent over the past year to 15.4 billion dollars. AFP reports that Venezuela's three SDR-selling transactions this year at the IMF have netted it more than 2.3 billion dollars.The fall in oil prices is the latest headache for Venezuela, and worsens an economy hit by recession, shortages of basic goods and high inflation.