New U.S. claims for unemployment fell to the lowest levels in almost four years, according to figures released Thursday by the Labor Department. For the week ending March 31, the level of new claims for unemployment came in at a seasonally adjusted level of 357,000, a decline of 6,000 from the previous week's revised average of 363,000.And while the previous figure was revised up somewhat from the 359,000 initially reported, this week's numbers come in lower than the 360,000 predicted by most economists.The last time the weekly jobless claims numbers came in this low or lower was in mid-April 2008, according to DOL statistics.