1. Allamakee County, Iowa, USA (4)
2. Benton County, Iowa, USA (1)
3. Black Hawk County, Iowa, USA (2)
4. Boone County, Iowa, USA (2)
5. Bremer County, Iowa, USA (2)
6. Carroll County, Iowa, USA
7. Cedar County, Iowa, USA (1)
8. Cerro Gordo County, Iowa, USA (1)
9. Clarke County, Iowa, USA (1)
10. Clay County, Iowa, USA (1)
11. Clayton County, Iowa, USA (3)
12. Clinton County, Iowa, USA (3)
13. Crawford County, Iowa, USA (1)
14. Davis County, Iowa, USA (1)
15. Des Moines County, Iowa, USA (1)
16. Dubuque County, Iowa, USA (1)
17. Emmet County, Iowa, USA
18. Franklin County, Iowa, USA (1)
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19. Fremont County, Iowa, USA (1)
20. Hardin County, Iowa, USA (6)
21. Henry County, Iowa, USA (3)
22. Iowa County, Iowa, USA (1)
23. Iowa, USA
24. Jackson County, Iowa, USA (3)
25. Jefferson County, Iowa, USA (3)
26. Johnson County, Iowa, USA (1)
27. Keokuk County, Iowa, USA (1)
28. Lee County, Iowa, USA (1)
29. Linn County, Iowa, USA (1)
30. Louisa County, Iowa, USA
31. Marion County, Iowa, USA (1)
32. Marshall County, Iowa, USA (1)
33. Mills County, Iowa, USA (5)
34. Monroe County, Iowa, USA (1)
35. Montgomery County, Iowa, USA (2)
36. Muscatine County, Iowa, USA
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37. O'Brien County, Iowa, USA (1)
38. Osceola County, Iowa, USA (1)
39. Plymouth County, Iowa, USA (3)
40. Pocahontas County, Iowa, USA (1)
41. Polk County, Iowa, USA (8)
42. Pottawattamie County, Iowa, USA (5)
43. Ringgold County, Iowa, USA (1)
44. Sac County, Iowa, USA (3)
45. Scott County, Iowa, USA (3)
46. Sioux County, Iowa, USA (2)
47. Story County, Iowa, USA (3)
48. Van Buren County, Iowa, USA (1)
49. Warren County, Iowa, USA (2)
50. Washington County, Iowa, USA (1)
51. Webster County, Iowa, USA (2)
52. Woodbury County, Iowa, USA (1)
53. Worth County, Iowa, USA (1)
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