{
  "fields": [{"id":"_id","type":"int"},{"id":"Horas Trabajadas","type":"text"},{"id":"año","type":"numeric"},{"id":"valor","type":"numeric"}],
  "records": [
    [1,"20 o menos",2013,20.4],
    [2,"Entre 21 y 30 horas",2013,17.2],
    [3,"Entre 31 y 40 horas",2013,22.9],
    [4,"Más de 40",2013,39.6]
]}