{
  "fields": [{"type":"int","id":"_id"},{"type":"numeric","id":"Anno"},{"type":"numeric","id":"Densita' rete metropolitana - Km per 100 Km2 di sup. urbanizz."}],
  "records": [
    [1,2013,43.4],
    [2,2014,44.4],
    [3,2015,48.9],
    [4,2016,48.9],
    [5,2017,49.6],
    [6,2018,48.9]
]}