{
  "fields": [{"id":"_id","type":"int"},{"id":"año","type":"numeric"},{"id":"valor","type":"numeric"}],
  "records": [
    [1,2010,4],
    [2,2011,3.5],
    [3,2012,3.6],
    [4,2013,3.9],
    [5,2014,5.2]
]}