{
  "fields": [{"id":"_id","type":"int"},{"id":"Tramo de edad","type":"text"},{"id":"año","type":"numeric"},{"id":"valor","type":"numeric"}],
  "records": [
    [1,"14 a 17",2011,1.7],
    [2,"18 a 24",2011,40.9],
    [3,"25 a 29",2011,57.4]
]}