title: Add normal curve and horizontal box-plot to already tabulated survey data
body: <p>I have some already tabulated survey data imported in a data frame and can making bar charts from it with ggplot.</p>
  
  <pre><code>  X                X.1 X.2
  3 Less than 1 year       7
  4        1-5 years      45
  5       6-10 years      84
  6      11-15 years     104
  7 16 or more years     249
  </code></pre>
  
  <p><code>ggplot(responses[3:7,], aes(y=X.2, factor(X))) + geom_bar()</code></p>
  
  <p>I would like to overlay a normal curve on the bar chart, and a horizontal box and whisker plot below that but I am unsure about the correct way to do this without the individual observations, it should be possible... I think. The example output I am trying to emulate is here: <a href="http://t.co/yOqRmOj5">http://t.co/yOqRmOj5</a></p>
  
  <p>I look forward to learning a new trick for this if there is one, or if anyone else had encountered it.</p>