{
  "fields": [{"id":"_id","type":"int"},{"id":"anno","type":"text"},{"id":"progressivo","type":"text"},{"id":"differenza","type":"text"}],
  "records": [
    [2,"2015","337","44"],
    [3,"2016","396","59"],
    [4,"2017","451","55"],
    [5,"2018","513","62"],
    [6,"2019","602","89"]
]}