Most of the whalers were Norwegian, with an increasing proportion of Britons. During the whaling era, the population usually varied from over 1000 in the summer (over 2000 in some years) to some 200 in the winter. At the height of the whaling industry about 6000 men, mostly Norwegians and Swedes, worked at the stations and, with the men working on the whale-catchers, factory ships and supply vessels, there could be three times the population when the whaling fleets were at anchor in the harbours. The first census conducted by the British Stipendiary Magistrate James Wilson on 31 December 1909 recorded a total population of 720, including 3 females and 1 child. Of them, 579 were Norwegian, 58 Swedes, 32 Britons, 16 Danes, 15 Finns, 9 Germans, 7 Russians, 2 Dutchmen, 1 Frenchman and 1 Austrian. In subsequent available censuses the population was 1337 (24 April 1921), and 709 (26 April 1931, includes the South Shetland Islands).