Unemployment rates rose in 21 states last month, the most number to report an increase since August. The report is a reminder of the job market's struggle to rebound even as the economy is improving.

The Labor Department says unemployment rates fell in 15 states in November and remained the same in 14 states. That's the fewest to see a drop in unemployment since August.

Georgia and Idaho endured the largest increases in unemployment. Georgia's rate rose to 10.1 percent from 9.8 percent. Idaho's jumped to 9.4 percent from 9.1 percent.

Michigan and Pennsylvania saw the biggest declines in unemployment last month. Michigan's rate fell to 12.4 percent from 12.8 percent. Pennsylvania's declined to 8.6 percent from 8.8 percent.