Under pressure from the Allies, in December 1943 quotas were imposed on the importation and exportation of certain goods and foodstuffs and in October 1944 sales of munitions were halted. However the transit of goods by railway between Germany, Italy and occupied France continued. North-South transit trade across Switzerland increased from 2.5 million tons prior to the war to nearly 6 million tons per year. No troops or "war goods" were supposed to be transshipped. Switzerland was concerned that Germany would cease the supply of the coal it required if it blocked coal shipments to Italy while the Allies, despite some plans to do so, took no action as they wanted to maintain good relations with Switzerland. Between 1939 and 1945 Germany exported 10,267,000 tons of coal to Switzerland. In 1943 these imports supplied 41% of Swiss energy requirements. In the same period Switzerland sold electric power to Germany equivalent to 6,077,000 tons of coal.