带有空格的动态json数据

我正试图使用dyntable将数据写入html表。其中一个标头称为Week of year。在JSON文件中，名称也是Week of year（带空格）。将json传递给dynatable:时

$('#week_table').dynatable({
    dataset: {
        records: [{"Week of year":"June 9, 2014 to June 15, 2014","a":0.0,"b":0.0,"c":0.0,"d":0.0,"e":1.0,"f":0.0},{"Week of year":"June 16, 2014 to June 22, 2014","a":0.0,"b":0.0,"c":5.0,"d":0.0,"e":16.0,"f":0.0}]
}});

并绘制到html表格：

  <table id="week_table">
    <thead>
      <th>weekOfYear</th>
      <th>Week of year</th>
      <th>a</th>
      <th>b</th>
      <th>c</th>
      <th>d</th>
      <th>e</th>
      <th>f</th>
    </thead>
    <tbody>
    </tbody>
  </table>

对于a到f，该表绘制得很好，但对于weekOfYear和Week of year，该表显示为未定义。如何将json传递给包含空格的dynatable？