More Americans fell below the poverty line last year, according to U.S. Census Bureau data released Tuesday. The nation's poverty rate rose to 15.1% in 2010, up from 14.3% in 2009 and to its highest level since 1993. Last year marked the third year in a row the rate increased. All told, 46.2 million people are considered in need. In addition, real median household income last year was $49,445, a 2.3% decline, the Census Bureau reported.