14. Trout have been farmed for over 100 years in fresh water and in sea water. The trout farming industry is geographically more widely based than the salmon industry and includes a range of farm sizes from a few tonnes per year up to almost 1,000 tonnes per year. Total UK production is fairly stable at about 15,000 tonnes per year. In 1994 production was 16,056 tonnes from 373 registered trout farms. Of this 11,917 tonnes were produced for the table with the balance going for restocking. Production in other European countries is considerably higher, e.g. Denmark with 41,000 tonnes, France with 50,000 tonnes and Italy with 42,000 tonnes. There are two phases in trout farming: hatchery plus fry rearing, usually using bore-hole or spring water; and later rearing which normally utilises river or lake water. Rainbow trout reach a marketable size of about 400g in one year in the south of the UK but not until their second year of life in more northerly regions. Outlets range from casual farm gate sales to organised supermarket distribution.