During the 1997-2006 period, total ANS production has declined from 1.3 million barrels per day (MMB/D) to less than 0.8 MMB/D. Production from the dominant and most mature Prudhoe Bay field has fallen by over 50% from about 0.75 MMB/D to about 0.35 MMB/D, while production from the second most mature field, Kuparuk, has fallen from about 0.3 MMB/D to below 0.2 MMB/D. Newer fields have not produced enough to offset the Prudhoe Bay and Kuparuk declines. Production from the largest and most recent of these newer fields, Alpine, was slightly over 0.1 MMB/D in 2006 and is expected to remain around this level over the next two to three years before beginning to decline. All other fields, as a group, have experienced a production decline from about 0.3 MMB/D to below 0.2 MMB/D. While more new fields are expected to be developed, total ANS production is projected to continue declining into the foreseeable future.