The graph from here:
<p><a class="external free" href="https://en.wikipedia.org/wiki/File:Oil_Prices_Medium_Term.png">http://en.wikipedia.org/wiki/File:Oil_Prices_Medium_Term.png</a>
</p><p>Completely redone from the ground up.  Same source is used:
Ten-day moving average of prices of NYMEX Light Sweet Crude, taken from data at the New Mexico Institute of Mining and Technology. Prices are nominal (not adjusted for inflation).
</p>
<a rel="nofollow" class="external text" href="http://octane.nmt.edu/gotech/Marketplace/Prices.aspx">http://octane.nmt.edu/gotech/Marketplace/Prices.aspx</a>
<a href="//commons.wikimedia.org/wiki/User:Theanphibian" title="User:Theanphibian">Theanphibian</a>
<span class="int-own-work" lang="en">Own work</span>