Royden Loewen illustrates some of the magnitudes in his Ethnic Farm Culture in Western Canada (Ottawa: Canadian Historical Association 2002), Canada's Ethnic Groups Series, Booklet No. 29. By 1911 the proportion of the rural population in the three Prairie provinces which was not English, French, or Aboriginal was already substantial, but reached nearly half of the region's rural population by 1931 (43.5% in Manitoba, 51.8% in Saskatchewan, and 45.3% in Alberta). Measured differently, according to birthplace of persons born outside Canada, the much larger presence of the foreign born in Canada was evident earlier as well. In 1900 the US census showed that 7.1 per cent of the rural population in the American Midwest and 12.5 per cent in the American West were foreign born. In western Canada, by contrast, the foreign born already formed 24.6 per cent of the rural population in 1901, just as immigration to western Canada began to accelerate.