{
  "fields": [{"id":"_id","type":"int"},{"id":"Durata","type":"text"},{"id":"2017","type":"numeric"},{"id":"2018","type":"numeric"}],
  "records": [
    [1,"Fino a 5 mesi",9.435,8.952],
    [2,"Da 6 a 11 mesi",5.858,4.918],
    [3,"Da 12 a 23 mesi",8.936,8.218],
    [4,"Da 24 mesi",15.675,16.647]
]}