title: Hidden labels in ggplot stacked facet
body: <p>Is there a way to increase ylim of the facets by a certain percentage so my labels fit in nicely?
  At the moment the very small bars will have a half cut off label above them. When I use hjust I have the same problem on the top of the large bars.</p>
  
  <p><img src="https://i.stack.imgur.com/VAqBJ.png" alt="enter image description here"></p>
  
  <p>Here's my code so far:</p>
  
  <pre><code>ggplot(test, aes(x=YEAR, y=(value), fill=variable)) +
     labs(title="Test", x=NULL, y="Total", fill=NULL) + 
     geom_bar(stat="identity"), position="stack") + 
     facet_grid(variable ~., scales="free") +
     theme(legend.position = "none") + 
     geom_text(aes(x=YEAR, y=(value), label=value), size=3)
  </code></pre>