FACTBOX: 18 countries affected by Russia-Ukraine gas row

(Reuters) - Russian Prime Minister Vladimir Putin ordered his officials on Monday to re-start gas supplies via Ukraine to Europe on Tuesday, six days after a contract row cut off customers in freezing temperatures.

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Following are details of how the crisis has affected countries that depend on Russian gas.

AUSTRIA -- About 60 percent of annual demand is met by Russian gas*

Gas flows stopped on January 7.

Oil and gas group OMV was drawing on reserves, domestic production and other imports to guarantee supply.

GERMANY -- Russian gas meets about 42 percent of annual demand*

German customers remained supplied in full as German gas market leader E.ON-Ruhgas and its peers turned to gas reserves, alternative North Sea supplier countries, and a route via Belarus and Poland to bypass Ukraine. A spokesman for Wingas, which receives the bulk of its gas via the alternative route, said the status was still comfortable and had not changed over the weekend.

TURKEY -- Russia meets about 67 percent of annual gas demand*

Russian gas is expected to begin flowing again on Turkey's western pipeline from Thursday and supplies will reach normal levels on Friday, an energy ministry source told Reuters.

Turkey had shut down three of its state-owned power plants last week and Iran boosted its gas exports to Turkey by 50 percent to 18 million cubic meters late last week.

GREECE -- Russia meets about 82 percent of annual gas demand*

Russian gas supplies via Ukraine to Greece were halted on January 6. But as a latecomer to creating infrastructure to supply gas to households, Greece is better placed to ride out the gas crisis than some of its neighbors because it continues to rely on oil for heating and power production.

State-owned gas firm DEPA said Russian natural gas supplies will take at least three days to return to the Balkans and Greece due to technical reasons. Greece takes Russian gas from a pipeline through Bulgaria but also imports gas from a Turkish pipeline to cover its 9.5 million cubic meter demand daily.

ITALY -- About 28 percent of annual demand for gas is met by

Russia*