Oil - proved reserves was published in 9 editions of the CIA World Factbook, from 2003 to 2011. The 2003 edition carries it in 97 entries, in its Economy section. Every entry is shown as that edition published it.
entries in the 2003 edition
97
the first edition with it
2003
the latest edition with it
2011
Published as “Oil - proved reserves” (2003 to 2011).
the entry has the field in that editionnot in that editionthe open editionEach entry below ends in its editions with Oil - proved reserves, 1990 to 2025. Point at a year above to follow it down; choose one in a row to read that edition’s text there.
Central Intelligence Agency. The World Factbook 2003, “Oil - proved reserves”, all entries. Archived by The Factbook, thefactbook.org/fields/oil-proved-reserves/2003.