title: Canvas.js not showing all label
body: <p>I have a graph like in the picture. But I am having trouble with the labels. I can not show all of the labels. When I hover on it it shows the label, but when I print it it doesn't display.</p>
  
  <p><a href="https://i.stack.imgur.com/Ofa4b.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Ofa4b.jpg" alt="broken chart"></a></p>
  
  <pre><code>var chart = new CanvasJS.Chart('chartContainer', 
      { 
          animationEnabled: true, 
          theme: 'theme4',
          title: { text: '' }, 
          axisY: { maximum: 100 , title: 'Faiz'},
          axisX: { labelAngle: -70 },
          exportEnabled: true,
          data: [{ 
              type: 'column',
              indexLabel: '{y}',
              indexLabelPlacement: 'outside',
              indexLabelOrientation: 'horizontal',
              indexLabel: '{y}',
              dataPoints: [
                          { label: 'Azərbaycan dili', y: 51 },
                          { label: 'Ədəbiyyat', y: 71 },
                          { label: 'Cəbr', y: 51 },
                          { label: 'Həndəsə', y: 61 },
                          { label: 'Fizika', y: 60 },
                          { label: 'Kimya', y: 56 },
                          { label: 'Biologiya', y: 49 },
                          { label: 'Tarix', y: 62 },
                          { label: 'Azərbaycan tarixi', y: 70 },
                          { label: 'Coğrafiya', y: 58 },
                          { label: 'Xarici dil', y: 57 },
                          { label: 'İnformatika', y: 62 },
                          { label: 'Rus dili', y: 43 },
                          { label: 'Riyaziyyat', y: 53 }
                      ] 
              }]
     });
  chart.render();
  </code></pre>