title: % occurrence as result in a Column
body: <p>I have this data set </p>
  
  <pre><code>Date Hour Indicator
  5/10/2018 9 F
  5/10/2018 9 F
  5/10/2018 9 F
  5/10/2018 9 NF
  </code></pre>
  
  <p>and looking to get this result set and need this result set as columns(No multiindex) as i can plot these</p>
  
  <pre><code>Date        Hour  Indicator %Indicator
  5/10/2018 9          F           75
  5/10/2018 9         NF          25
  </code></pre>