{
  "fields": [{"type":"int","id":"_id"},{"type":"numeric","id":"Anno"},{"type":"numeric","id":"Disponibilita' convogli metropolitana per 100mila ab"}],
  "records": [
    [1,2013,12.4],
    [2,2014,11.0],
    [3,2015,11.7],
    [4,2016,12.5],
    [5,2017,13.0],
    [6,2018,13.3]
]}