(The State) — In 1958, when Colin Powell received his bachelor’s degree from City College of New York, the U.S. jobless rate was about 6 percent.  Today, as the retired U.S. secretary of state delivers the commencement address at S.C. State University, the national unemployment rate is hovering about 9 percent.  African-Americans, however, only can wish their jobless rate was that low. The black unemployment rate was 15.5 percent in March, according to the U.S. Bureau of Labor Statistics.  That’s the world African-American college graduates face as they decide what to do now that they have their undergraduate degrees.  “It’s tough,” said Keisha Krider, about to get her master’s of business administration degree from Orangeburg’s S.C. State. “Even at career fairs, a lot of companies will come, but they’re not hiring.”