The rise in filibusters

Tonight on the Rachel Maddow Show, Rachel put up a graph showing the rise in filibusters since Republicans became the minority party after the 2006 election.

Here are a couple of graphs to illustrate the point (click on the graph to see it with it's original story).

The first graph covers the period from 1973 through October 2008:

The second graph from FiveThirtyEight covers only the presidencies of both Bush's and Clinton but also shows which party was in control of the Senate: