{
  "fields": [{"id":"_id","type":"int"},{"id":"Tramo de edad meses","type":"text"},{"id":"año","type":"numeric"},{"id":"valor","type":"numeric"}],
  "records": [
    [1,"1 a 3 meses",2013,32.7],
    [2,"4 a 8 meses",2013,33.8],
    [3,"9 meses o más",2013,33.5]
]}