UNITED STATES

摘要

From January 1993 onwards, the most recent quarterly average is based on historical prices for two months of the quarterly period and an estimate of the third month. These monthly data are then averaged for the publication quarter. Prices from 4Q84 to 4Q92 refer to the second month of the quarter. Prior to 4Q84, prices refer to the first month in the quarter. See individual products for details. General Tax (Sales Tax): In nearly all states a sales tax is levied on all sales of goods and services to noncommercial users. The rates vary between states. In some states, additional local sales taxes are also levied. The IEA has estimated national weighted averages of these rates as far as they apply to energy products and used them in the computation of total tax amounts shown in the main tables.