The 1998 National Drug Control Strategy specified five goals and thirty-two supporting objectives that will guide the government's anti-drug program over the next decade. The Strategy's five goals amount to reducing the supply of and the demand for illicit drugs by 50 percent by year 2007. The nation's ability to meet these goals depends on its efficacy at reducing drug availability through source country programs, transit zone interdiction, and domestic law enforcement. Having adopted this assessment for monitoring the success of the nation's anti-drug programs, one critical input -- the topic of this paper -- is a reliable estimate of cocaine availability at various points in cocaine's flow from source to the United States. This report updates the Sequential Transition and Reduction (STAR) model through 2000, providing the best current basis for measuring the flow of cocaine from producer nations, through the transit zones, across the nation's borders, and throughout the U.S.