Statistics for Rivers Forming US State Borders

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States	River	% Correct
Arkansas, Illinois, Iowa, 7 others	Mississippi	98%
Iowa, Kansas, Missouri, 2 others	Missouri	93%
Illinois, Kentucky, Ohio, 2 others	Ohio	86%
Arizona, California, Nevada	Colorado	84%
New Jersey, New York	Hudson	80%
New Mexico, Texas	{Rio} {Grande}	80%
Oregon, Washington	Columbia	72%
DC, Virginia, 2 others	Potomac	71%
Delaware, New Jersey, 2 others	Delaware	67%
Idaho, Oregon, Washington	Snake	63%
Kentucky, Tennessee, 2 others	Tennessee	52%
New Hampshire, Vermont	Connecticut	44%
Minnesota, North Dakota	{Red} River of the {North}	37%
Georgia, South Carolina	Savannah	37%
Arkansas, Oklahoma, Texas	{Red} River of the {South}	36%
Illinois, Indiana	Wabash	30%
Alabama, Georgia	Chattahoochee	28%
Minnesota, Wisconsin	{St} {Croix}	17%
Louisiana, Mississippi	Pearl	14%
Florida, Georgia	{St} {Marys}	10%
Kentucky, Virginia, West Virginia	{Tug} {Fork}	5%
Minnesota, N Dakota, S Dakota	{Bois} {de} {Sioux}	4%
Maine, New Hampshire	Piscataqua	3%
Maine, New Hampshire	{Salmon} {Falls}	2%