title: Test for significance in a time series using R
body: <p>Given a simplified example time series looking at a population by year</p>
  
  <pre><code>Year&lt;-c(2001,2002,2003,2004,2005,2006)
  Pop&lt;-c(1,4,7,9,20,21)
  DF&lt;-data.frame(Year,Pop)
  </code></pre>
  
  <p>What is the best method to test for significance in terms of change between years/ which years are significantly different from each other?</p>