U.S. total = 2.38 gallons

<1.89:

Arkansas
Oklahoma
Utah
West Virginia

1.89–2.10:

Alabama
Georgia
Idaho
Kansas
Kentucky
Maryland
Ohio

>2.10–2.31:

Arizona
Indiana
Mississippi
Nebraska
New Mexico
New York
North Carolina
South Carolina
Tennessee
Texas
Virginia
Washington

>2.31:

Alaska
California
Colorado
Connecticut
Delaware
District of Columbia
Florida
Hawaii
Illinois
Iowa
Louisiana
Maine
Massachusetts
Michigan
Minnesota
Missouri
Montana
Nevada
New Hampshire
New Jersey
North Dakota
Oregon
Pennsylvania
Rhode Island
South Dakota
Vermont
Wisconsin
Wyoming