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Llinell 8: {\| class="wikitable sortable" align="center" style="text-align:right" \|+ '''Y gwledydd sy'n cynhyrchu mwyaf o lo (miliwn tunnell)''' <ref name="BPReview2011">{{cite web \| url = http://www.bp.com/liveassets/bp_internet/globalbp/globalbp_uk_english/reports_and_publications/statistical_energy_review_2011/STAGING/local_assets/spreadsheets/statistical_review_of_world_energy_full_report_2011.xls \| title = BP Statistical review of world energy 2011 \| publisher = British Petroleum \| format = XLS \| month = Mhefin \| year = 2011 \| accessdate = 2011-06-10 \| archiveurl =~~http~~ https://web.archive.org/web/20110626160435/http://www.bp.com/liveassets/bp_internet/globalbp/globalbp_uk_english/reports_and_publications/statistical_energy_review_2011/STAGING/local_assets/spreadsheets/statistical_review_of_world_energy_full_report_2011.xls \| archivedate = 2011-06-26 \| url-status = live }}</ref> \|- ! width="120pt"\|Gwlad

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