Over-the-month percent change in import price indexes, January 2008-January 2009 (not seasonally adjusted) Percent changes Month All imports Petroleum imports Nonpetroleum imports Jan 2008 1.5 4.2 0.7 Feb 0.2 -1.3 0.6 Mar 3.1 10.1 1.1 Apr 2.8 8.1 1.3 May 2.8 9.7 0.7 Jun 3.0 9.2 0.9 Jul 1.4 3.3 0.6 Aug -3.1 -9.8 -0.4 Sep -3.6 -11.4 -1.0 Oct -6.0 -22.2 -0.9 Nov -7.3 -29.9 -1.7 Dec -5.0 -27.2 -1.1 Jan 2009 -1.1 -2.4 -0.8