{
  "fields": [{"id":"_id","type":"int"},{"id":"Incorporación","type":"text"},{"id":"año","type":"numeric"},{"id":"valor","type":"numeric"}],
  "records": [
    [1,"Muy temprana",2013,3.2],
    [2,"Temprana",2013,24.7],
    [3,"Oportuna",2013,67.5],
    [4,"Tardía ",2013,4.6]
]}