{
  "fields": [{"id":"_id","type":"int"},{"id":"clave","type":"numeric"},{"id":"año","type":"numeric"},{"id":"valor","type":"numeric"}],
  "records": [
    [1,1,2005,20.7],
    [2,1,2006,21.6],
    [3,1,2007,32.6],
    [4,1,2008,37.3],
    [5,1,2009,41],
    [6,1,2010,45.5],
    [7,1,2011,47.1],
    [8,1,2012,50.5]
]}