California prison population from 1851 to present. Data from <a rel="nofollow" class="external text" href="http://casi.cjcj.org/about.html">California Sentencing Institute</a>.
<a href="//commons.wikimedia.org/wiki/User:Grendelkhan" title="User:Grendelkhan">Grendelkhan</a>
<span class="int-own-work" lang="en">Own work</span>