如何在智能表中按小数字到大数字排序？

以下是我的代码，当用户单击第一个标题ID时，它将按ID号
（1-> 2-> 3->-11-> 23）排序，
但结果是（1-> 11-> 2-> 23 -> 3）
我希望结果按较小的数字到较大的数字排序或按较大的数字到较小的数字排序...我不想在单个数字中加零.....

<div class='container' ng-app='smarttabledemo' ng-controller='smarttabledemo'>
      <h3>Smart-Table</h3>
      <table st-table='data' class='table'>
        <thead>
          <tr>
            <th st-sort='ID'>ID</th>
            <th st-sort='firstName'>First Name</th>
            <th st-sort='lastName'>Last Name</th>
            <th st-sort='phone'>Phone Number</th>
            <th st-sort='hometown'>Hometown</th>
          </tr>
        </thead>
        <tbody>
          <tr st-select-row='row' ng-repeat='row in data'>
          <td>{{row.ID}}</td>
            <td>{{row.firstName}}</td>
            <td>{{row.lastName}}</td>
            <td>{{row.phone}}</td>
            <td>{{row.hometown}}</td>
          </tr>
        </tbody>
      </table>

    </div>

我的json文件

  $scope.data = [
    { ID: '3',firstName: 'Sam', lastName: 'Evans', phone: 'Not Provide', hometown: 'Anytown, ST' },
    { ID: '23',firstName: 'Saul', lastName: 'Evans', phone: '555-555-1234', hometown: 'Anytown, ST' },
    { ID: '1',firstName: 'Charlie', lastName: 'Anders', phone: '555-555-9876', hometown: 'Springfield, ST' },
    { ID: '2',firstName: 'Jessica', lastName: 'Cortez', phone: 'Not Provide', hometown: 'Springfield, ST' },
    { ID: '11',firstName: 'Amy', lastName: 'Wood', phone: '555-555-1348', hometown: 'Metroville, ST' },
  ]

以下是我的小提琴演示，谢谢
小提琴