Qatar
15.2 billion bbl (2006 est.)
Romania
500 million bbl (yearend 2004)
Russia
74.4 billion bbl (2005 est.)
Rwanda
0 bbl (1 January 2002)
Saudi Arabia
262.7 billion bbl (2006 est.)
Serbia
38.75 million bbl (1 January 2002)
Slovakia
9 million bbl (1 January 2006)
Somalia
0 bbl (1 January 2002)
South Africa
7.84 million bbl (1 January 2002)
Spain
10.5 million bbl (1 January 2002)