title: In-Place Update of Values in Pandas Dataframe
body: <p>I'm new to pandas. I've built a dataframe where all the values are lists that look like [Year, Datapoint] (e.g. [2013, 37722.322] or [1998, 32323.232). How do I get rid of the year value and just replace the list in each cell in the dataframe with just the float datapoint?</p>
  
  <p>Thanks so much.</p>