title: Create a graph of a pivot_table in Python
body: <p>I create a pivot table and I want create a bar graph. This is my pivot_table:
  <a href="https://i.stack.imgur.com/prJsb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/prJsb.png" alt="Information" /></a></p>
  <p>I don't know how to stract the values of the column 1970 and use this information to make a bar graph.</p>
  <p>Thanks!!</p>