title: ConversionError: Failed to convert value(s) to axis units: 'Toyota'
body: <p><a href="https://i.stack.imgur.com/qXD5M.png" rel="nofollow noreferrer">DataFrame screenshot</a></p>
  <p>DataFrame Graph:</p>
  <p><img src="https://i.stack.imgur.com/HKaKv.png" alt="DataFrame Graph" /></p>
  <pre><code>fig = plt.figure(figsize=(16,8))
  
  sns.barplot(x=ncs_2007_2017.index, y='Units Sold', data=ncs_2007_2017)
  
  for i in range(len(ncs_2007_2017.index)):
      plt.text(i, ncs_2007_2017['Make'].iloc[i], str(ncs_2007_2017['Make'].iloc[i]), ha='center', va='center')
  
  plt.show()
  </code></pre>
  <pre class="lang-none prettyprint-override"><code>ConversionError: Failed to convert value(s) to axis units: 'Toyota'
  </code></pre>
  <p>I am a newbie in data analysis can anyone here helps me how to fix this error?</p>