In 1942, when wood gas had not yet reached the height of its popularity, there were about 73,000 wood gas vehicles in Sweden, 65,000 in France, 10,000 in Denmark, and almost 8,000 in Switzerland.
在1942年（当木煤气还没有达到普及的最高程度），大约有73,000辆木煤气汽车在瑞典，65,000辆在法国，10,000辆在丹麦和将近8,000辆在瑞士。