es.length / 1000);

new Highcharts.Chart({
  chart: {
    renderTo:'container_number_of_requests',
    polar:true,
    type:'column',
    height:330
  },
  credits:{
    enabled:false
  },
  title:{
    text:'<span class="chart_title">Number of requests</span>',
    useHTML: true,
    widthAdjust:-20
  },
  xAxis:{
    tickmarkPlacement:'on',
    tickInterval: tickInterval,
    categories:numberOfRequestsData.names,
    labels:{ enabled:false }
  },
  yAxis:{
    min:0,
    reversedStacks: false
  },
  plot