Over-the-month percent change in import price indexes, all imports and petroleum imports, September 1999-September 2000 All imports Petroleum imports Sep-99 1.0 8.3 Oct-99 0.2 1.7 Nov-99 0.8 4.1 Dec-99 0.6 6.3 Jan-00 0.4 3.7 Feb-00 2.1 14.9 Mar-00 0.1 -0.8 Apr-00 -1.4 -11.3 May-00 0.4 4.5 Jun-00 1.3 10.6 Jul-00 0.0 -1.6 Aug-00 0.2 0.1 Sep-00 1.5 14.1