<Tr> <Td> World total </Td> <Td> 986.6 </Td> </Tr> <Tr> <Td_colspan="2"> Source: UN Food & Agriculture Organisation (FAO) </Td> </Tr> <P> Pigs are farmed in many countries, though the main consuming countries are in Asia, meaning there is a significant international and even intercontinental trade in live and slaughtered pigs . Despite having the world's largest herd, China is a net importer of pigs, and has been increasing its imports during its economic development . The largest exporters of pigs are the United States, the European Union, and Canada . As an example, more than half of Canadian production (22.8 million pigs) in 2008 was exported, going to 143 countries . Older pigs will consume eleven to nineteen litres (three to five US gallons) of water per day </P> <P> The way in which a stockperson interacts with pigs affects animal welfare which in some circumstances can correlate with production measures . Many routine interactions can cause fear, which can result in stress and decreased production . </P>

Where are hogs and pigs raised in the world