There is no data in the table

There is no data in the table. I'd like to bring the price in the red circle on the firebase to the table. I don't know if the path is wrong or the variable is wrong.

 https://i.imgur.com/9uS84eD.png
 https://i.imgur.com/sV6rRMH.png



  function get_mask_list() {
      var maskRef = database.ref('Admin/Center/' + userInfo.uid);       
      maskRef.on('value', on_child_added)            
  }

  function on_child_added(data) {

      var today = new Date();
      var dd = today.getDate();
      var mm = today.getMonth() + 1; //January is 0!
      var yyyy = today.getFullYear();

      if (dd < 10) {
          dd = '0' + dd
          }
      if (mm < 10) {
          mm = '0' + mm
          }
      today = yyyy + '.' + mm + '.' + dd;      
      }

function on_child_added(data) {

var content = '';
      var maskData = data.val();
      var name = maskData.name;
      var adr = maskData.adr;
      var ivn = maskData.ivn;         
      var 분출량 = maskData.분출량.yyyy.mm.dd
      console.log(분출량)

      content += '<tr>';
      content += '<td>' + today + '</td>';
      content += '<td>' + name + '</td>';
      content += '<td>' + adr + '</td>';
      content += '<td>' + ivn + '</td>';
     // content += '<td>' + 분출량 + '</td>';


      content += '<tr>';
      $('.table').append(content);

  }

 https://i.imgur.com/Ev1EjJJ.png
 https://i.imgur.com/DGVXIjJ.png