{
  "fields": [{"id":"_id","type":"int"},{"id":"Tramo de edad","type":"text"},{"id":"año","type":"numeric"},{"id":"valor","type":"numeric"}],
  "records": [
    [1,"12 a 14",2013,33.3],
    [2,"15 a 19",2013,42.5],
    [3,"20 a 24",2013,47.3],
    [4,"25 a 29",2013,43.9]
]}