ASSOCIATED PRESS

The most and least economically stressed counties with populations over 25,000 and their December 2009 Stress scores, according to the Associated Press Economic Stress Index:

MOST STRESSED

1. Imperial County, 31.57

2. Merced County, 26.44

3. Lyon County, Nev., 24.93

4. San Benito County, 24.46

5. Sutter County, 24.13

6. Yuba County, 24.11

7. Stanislaus County, 23.92

8. San Joaquin County, 23.57

9. Lapeer County, Mich., 23.1

10. Marion County, S.C., 22.93

11. Nye County, Nev., 22.9

12. Chester County, S.C., 22.87

13. Clark County, Nev., 22.78

14. Lake County, 22.65

15. Lauderdale County,

Tenn., 22.48

16. Union County, S.C., 22.26

17. Sanilac County,

Mich., 21.71

18. Riverside County, 21.67

19. Iosco County, Mich., 21.6

20. Marshal County,

Tenn., 21.53

Twenty least economically stressed counties with populations over 25,000 and their December 2009 Stress scores, according to the Associated Press Economic Stress Index:

LEAST STRESSED

1. Ellis County, Kan., 3.5

2. Ford County, Kan., 3.78

3. Riley County, Kan., 3.85

4. Buffalo County, Neb., 4.08

5. Brookings County, S.D., 4.09

6. Brown County, S.D., 4.13

7. Finney County, S.D., 4.17

8. Ward County, N.D., 4.44

9. Clay County, Minn., 4.48

10. Grand Forks County,

N.D., 4.53

11. Burleigh County, N.D., 4.6

12. Madison County,

Neb., 4.73

13. Arlington County, Va., 4.73

14. Platte County, Neb., 4.8

15. Lincoln County, S.D. 4.94

16. Sioux County, Iowa, 4.97

17. Albany County, Wyo., 4.97

18. Johnson County,

Iowa, 5.01

19. Monongalia County, W.Va., 5.11

20. Lancaster County, Neb., 5.2