Million Barrels Year 154 '55 56 157 158 159 '60 '61 '62 163 '64 65 SOURCE: IPAA (Natural Gas Plants Excluded) (Alaska North Slope reserves not included.) Proved Reserves are as of the end of the year for which they are posted. Since data are published as of January 1, this means the data are posted for the year before that indicated by their published year. Millions of Dollara 5, Millions of Barrels 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 SOURCE: Independent Petroleum Association of America (Alaska North Slope reserves not included.) Changes are from end of previous year to end of year posted. Since data are published as of January 1, this means the changes are calculated by subtracting the posted years figure from that for the next year. |