{
  "fields": [{"id":"_id","type":"int"},{"id":"Tramo de Edad","type":"text"},{"id":"año","type":"numeric"},{"id":"valor","type":"numeric"}],
  "records": [
    [1,"Menor de 20 años ",2013,8],
    [2,"20 a 34 años ",2013,6],
    [3,"Mayor de 34 años ",2013,11.7]
]}