Statistics for English rivers by county.

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Counties	Answer	% Correct
Gloucestershire, Wiltshire, Oxfordshire, Berkshire, Buckinghamshire, Surrey, London, Kent, Essex.	Thames	100%
Greater Manchester, Cheshire, Merseyside.	Mersey	82%
Powys, Shropshire, Worcestershire, Gloucestershire.	Severn	74%
Gloucestershire, Wiltshire, Somerset, Bristol.	Avon	72%
Staffordshire, Derbyshire, Leicestershire, Nottinghamshire, Lincolnshire, Yorkshire.	Trent	70%
Northamptonshire, Cambridgeshire, Lincolnshire, Norfolk.	Nene	48%
Northamptonshire, Buckinghamshire, Bedfordshire, Cambridgeshire, Norfolk.	Great Ouse	41%
Dorset, Wiltshire, Somerset.	Stour	7%
Northumberland, Durham, Tyne and Wear.	Derwent	5%