title: I want to show the numbers at risk in a survival or cumulative incidence plot under the x-axis
body: <p>Under the x-axis marks, I'd like to annotate the y-values corresponding to those x-values. Best explained by this graph: 
  <a href="https://skydrive.live.com/?cid=F115F58522F3F896&amp;id=F115F58522F3F896%21103" rel="nofollow">Example</a></p>