The period from the 1870s to the start of the First World War saw a steep rise in working-class living standards in Britain, much of it underpinned by a vast array of cheap imported foods. Thanks to new refrigerated steamships and a growing railway network, such items as butter, eggs and meat could be transported from as far afield as New Zealand and Argentina. The British started to eat butter from Denmark; oranges and grapes from Spain; mutton from Argentina; bacon and cheese from the United States; wheat from Canada. The percentage of meat consumed in Britain that was imported rose from 13.6 per cent in 1872 to 42.3 per cent in 1912. The influx of these new cheap food imports gave many in the working classes a much more varied and tasty diet than before. Eggs were no longer a luxury and as the price of imported fruit fell, many in the cities started eating oranges and bananas for the first time. They could only afford to buy these foods because the costers who sold them kept the prices too low to allow themselves a decent life. By the same token, big shopkeepers kept food prices down by forcing employees to work long hours for low pay. A ninety-hour week was not uncommon for a clerk in a Victorian grocer shop, but these hours still might not deliver a wage large enough to live on, despite the cheapness of food.