Where did you get THAT stat? I just found this one:
In 2003, Persian Gulf countries had estimated net oil exports of 17.2 million bbl/d of oil (see pie chart). Saudi Arabia exported the most oil of any Persian Gulf country in 2003, with an estimated 8.40 million bbl/d (49% of the total). Also, Iran had estimated net exports of about 2.6 million bbl/d (15%), followed by the United Arab Emirates (2.4 million bbl/d -- 14%), Kuwait (2.0 million bbl/d -- 12%), Iraq (0.9 million bbl/d -- 9%), Qatar (0.9 million bbl/d -- 5%), and Bahrain (0.01 million bbl/d -- 0.1%).
-- from THIS Dept. of Energy website
Your numbers add up to ~100%. Your source is counting exports from the Persian Gulf only, not world-wide oil supply. Russia, Venezuela, Canada, Norway, Mexico, the U.S., the U.K., Indonesia etc. account for substantial quantities of world supply.