| Date - Field | United States - Oil - proved reserves |
2009 January Oil - proved reserves | 20.97 billion bbl (1 January 2008 est.) |
2008 January Oil - proved reserves | 21.76 billion bbl (1 January 2006 est.) |
2007 January Oil - proved reserves | 22.45 billion bbl (1 January 2002) |
2006 January Oil - proved reserves | 22.45 billion bbl (1 January 2002) |
2005 January Oil - proved reserves | 22.45 billion bbl (1 January 2002) |
2004 January Oil - proved reserves | 22.45 billion bbl (1 January 2002) |
2003 January Oil - proved reserves | 22.45 billion bbl (January 2002 est.) |
2002 January Oil - proved reserves | void - (all current Economy informations) |
2001 January Oil - proved reserves | void - (all current Economy informations) |
2000 January Oil - proved reserves | void - (all current Economy informations) |