Over-the-month percent change in price indexes for petroleum and nonpetroleum imports, November 2007–November 2008 (not seasonally adjusted) Percent change All imports Petroleum imports Nonpetroleum imports Nov-07 3.2 12.4 0.7 Dec-07 -0.2 -1.8 0.4 Jan-08 1.5 4.2 0.7 Feb-08 0.2 -1.3 0.6 Mar-08 3.1 10.1 1.1 Apr-08 2.8 8.1 1.3 May-08 2.8 9.7 0.7 Jun-08 3.0 9.2 0.9 Jul-08 1.4 3.3 0.6 Aug-08 -3.1 -9.8 -0.4 Sep-08 -3.5 -11.2 -0.9 Oct-08 -5.4 -19.8 -0.9 Nov-08 -6.7 -25.8 -1.8 Data may be revised in each of the three months after original publication.