Name Sites Samples
Ukraine 100 245
Ulster County 3 24
Union County 1 3
Union County 1 2
Union County 1 6
Union County 1 5
Union County 3 7
Union Parish 2 4
United Kingdom 1202 4687
United States 19429 81337
Upshur County 12 61
Uruguay 9 40
Van Buren County 2 14
Venango County 3 15
Vernon Parish 9 19
Victoria County 8 49
Wabasha County 1 7
Wabaunsee County 2 12
Wake County 1 1
Walker County 1 6
Walsh County 1 1
Walton County 31 76
Walworth County 1 2
Warren County 2 10
Warren County 1 1
Warren County 1 4
Warren County 4 5
Warren County 2 7
Washington County 1 1
Washington County 1 4