 Complete the following phrase:  In the 19th century, Denmarks main food export was grain to the UK, but it was outcompeted by the United States and Russia and began to switch to pigs and butter from dairy herds. From 1840 to 1870 grain was almost half of Denmarks exports, but by 1900 this had fallen to under 3 per cent. Denmark exported bacon to the United Kingdom from at least 1847, when flitches of bacon were specially prepared for the English market, but had no large-scale production until 1864, when the 