Ratio world proved crude oil reserves to production. Data from US DOE EIA.<a rel="nofollow" class="external autonumber" href="http://www.eia.gov/cfapps/ipdbproject/IEDIndex3.cfm?tid=5&amp;pid=53&amp;aid=1">[1]</a> Data is in plain text in the svg file and can be updated with a text editor.
<a href="//commons.wikimedia.org/wiki/User:Delphi234" title="User:Delphi234">Delphi234</a>
2014-06-07
<span class="int-own-work" lang="en">Own work</span>