{
  "fields": [{"id":"_id","type":"int"},{"id":"Tramo de Edad","type":"text"},{"id":"año","type":"numeric"},{"id":"valor","type":"numeric"}],
  "records": [
    [1,"15 a 19",2013,27.1],
    [2,"20 a 24",2013,24.4],
    [3,"25 a 29",2013,26.3]
]}