doe eia 0216 93 distribution category uc 950 us crude oil natural gas and liquids reserves 1993 annual report energy information administration office of department washington dc 20585 this was prepared by the independent statistical analytical agency within contained herein should not be construed as advocating or reflecting any policy position other organization diskette historical data are available on a 3 5 25 inch high density these cover years 1977 through published in reports seventeen separate ascii files stored single each contains following tables proved changes production total dry wet after lease separation nonassociated associated dissolved