agricultural in your statistics uk pocket department for environment food and rural affairs scottish executive of agriculture development northern ireland welsh assembly government the planning countryside key 5 6 contribution agri industry to national economy gross value added chain 7 8 retail price index 10 estimates average household drink expenditure 11 energy intake derived from 12 trade feed at 2004 prices 13 self sufficiency 14 structure 15 land use crop areas 16 livestock numbers 17 size holdings 18 by farm type 19 labour force 20 age holders 21 training holder managers 22 commodities 23 production wheat barley 24 meat 25 yield milk 26 potatoes vegetables 27 28 indices products input rents 29 30 income