Highmaps MapBubble标签堆叠

Question

我正在为我的dataArray中的每个国家解析多个职业到我的HighMaps Mapbubble。 Highmaps将它们视为单独的点，并在地图上将它们堆叠在一起。因此，只有最近的职业在地图上可见，因为所有其他职业都堆放在最新职业之后。

有没有办法让这个国家的所有职业都可见？

这是我目前的Highmaps代码：

Highcharts.mapChart('container', {
      chart: {
          borderWidth: 1,
          map: 'custom/world'
      },

      title: {
          text: "Where's everybody from?"
      },

      subtitle: {
          text: 'See where your peers are from and what they do'
      },

      legend: {
          enabled: false
      },

      mapNavigation: {
          enabled: true,
          buttonOptions: {
              verticalAlign: 'bottom'
          }
      },

      series: [{
          name: 'Countries',
          color: '#E0E0E0',
          enableMouseTracking: false
      }, {
          type: 'mapbubble',
          name: 'Occupation: ',
          joinBy: ['iso-a2', 'code'],
          data: dataArray,
          dataLabels: {
            allowOverlap:false,
            enabled: true,
          },
          minSize: 1,
          maxSize: '10%',
          tooltip: {
            pointFormat: '{point.occupation}'
        }
      }]
  });

这是我的Firebase JSON导出的摘录，用于显示我拥有的数据格式：

[{
  "code" : "PK",
  "occupation" : "computer science ",
  "z" : 1
},
{
  "code" : "PK",
  "occupation" : "another computer science occupation",
  "z" : 1
},
{
  "code" : "US",
  "occupation" : "manager ",
  "z" : 1
},
{
  "code" : "UG",
  "occupation" : "test24",
  "z" : 1
}]