title: display annotation for zero value in google charts
body: <p>I am creating a column chart using google charts API. I created all data columns and displayed annotations in the column. But the problem is, if column value is zero then annotation is not displaying. How to resolve this problem. I need to display '0'.</p>
  
  <p>my code is:</p>
  
  <pre><code>google.load('visualization', '1.0', {'packages':['corechart']});
          google.setOnLoadCallback(drawChart4);
          function drawChart4() {
  
          var data = new google.visualization.DataTable();
          data.addColumn({ type: 'string', lable:'Something'});
          data.addColumn('number','SLA Met');
          data.addColumn({ type: 'number', role: 'annotation'});
          data.addColumn('number','SLA Not Met'); 
          data.addColumn({ type: 'number', role: 'annotation'});
          data.addRows([
            ['Ancillary',&lt;%=ANCILLARY_MET %&gt;,&lt;%=ANCILLARY_MET %&gt;,&lt;%=ANCILLARY_NOTMET%&gt;,&lt;%=ANCILLARY_NOTMET%&gt; ],
            ['CIS',&lt;%=CIS_MET %&gt;,&lt;%=CIS_MET %&gt;,&lt;%=CIS_NOTMET%&gt;,&lt;%=CIS_NOTMET%&gt;],
            ['ERP FSCM',&lt;%=FSCM_MET %&gt;,&lt;%=FSCM_MET %&gt;,&lt;%=FSCM_NOTMET%&gt;,&lt;%=FSCM_NOTMET%&gt;],
            ['ERP HCM',&lt;%=HCM_MET %&gt;,&lt;%=HCM_MET %&gt;,&lt;%=HCM_NOTMET%&gt;,&lt;%=HCM_NOTMET%&gt;]
            ]);
  
            var options = {'colors' : ['#3366CC', '#fcb441'],
                    title: 'Resolution SLA(Tower Wise)',titleTextStyle:{fontName:'"Arial"'},
                   hAxis: {title: 'Tower', titleTextStyle: {color: 'black',fontSize:'15',fontName:'"Arial"'}},
                   vAxis: {minValue:0},
                   legend:{position: 'bottom'},
                   tooltip:{trigger:'none'}
                  };
            var chart = new google.visualization.ColumnChart(document.getElementById('g5'));
            chart.draw(data, options);
          }
  </code></pre>