Change in Classification for Angola

With effect from the OMR of 13 February 2007, Angolan production will be reclassified within OPEC and excluded from the non-OPEC total, for the period January 2007 onwards. Historical data prior to January 2007 will continue to allocate Angolan production to non-OPEC. We will take the opportunity of Angola’s entry to OPEC to standardise the currently different data series contained in the Monthly Oil Data Service and those of the OMR’s Annual Statistical Supplement. From February, all historical data will show a primary OPEC total with OPEC as it was comprised at the time in question, and similarly for non-OPEC. In summary:

• Angolan supply will be allocated to the non-OPEC total through December 2006, but included within the OPEC aggregate from January 2007 onwards;

• Ecuador will be included in OPEC totals through 1992, but in non-OPEC thereafter;

• Gabon will be included in OPEC totals through 1994, but in non-OPEC thereafter.

To facilitate year-on-year comparisons, new secondary aggregates showing current OPEC and non-OPEC compositions extended back into history will be added to the databases.

Extract from Oil Market Report dated 18 January 2007