{
  "fields": [{"id":"_id","type":"int"},{"id":"Tramo de Edad","type":"text"},{"id":"año","type":"numeric"},{"id":"valor","type":"numeric"}],
  "records": [
    [1,"15 a 19",2013,4.9],
    [2,"20 a 24",2013,24.6],
    [3,"25 a 29",2013,44.3]
]}