Looking for a job? Pack up your things and move to Nebraska: It is the only state, according to new data, to escape a rising unemployment rate in February. Michigan still leads the pack in unemployment, with a rate of 12 percent. Oregon, North Carolina, California, Rhode Island, and Nevada also have double-digit unemployment rates. Both North Carolina’s and Oregon’s rates rose a full one percent, and New Jersey’s rose 0.9 percent. The causes differ from state to state: Michigan, Rhode Island, and the Carolinas are reliant on the sluggish manufacturing industry; California and Nevada rely on construction, whose decline has, in turn, crippled the timber industry in Oregon.