AverageRating is null in JSOM

I am trying to get the rating field from a SharePoint pages library in JavaScript, after using the get_item('AverageRating') it's returning null.

My function looks like the following:

   var context = SP.ClientContext.get_current();
   var targetList = context.get_web().get_lists().getByTitle('Pages');
   var query = new SP.CamlQuery();
   query.set_folderServerRelativeUrl("pages/subfolder");
   query.set_viewXml('<View Scope=\"RecursiveAll\">\
   <Query>\
   <Where>\
      <Neq>\
    <FieldRef Name="ContentType" />\
    <Value Type="Text">Folder</Value>\
     </Neq>\
   </Where>\
    <OrderBy><FieldRef Name="Created" Ascending="FALSE"/></OrderBy></Query></View>');


    var listItems = targetList.getItems(query);

    var results = context.loadQuery(listItems);
    context.executeQueryAsync(_onSucceed, _Fail);

   function _onSucceed(){

        var html="";

        for(var i = 0; i <results.length; i++){
        html+="<p>"+results[i].get_item("AverageRating")+"</p>";
        }


        $(divSelector).html(html); 

   }

   function _Fail(){
   alert("fail"); 
   }

Is there something wrong with this approach?