{
  "fields": [{"id":"_id","type":"int"},{"id":"年度","type":"text"},{"id":"信号機数","type":"numeric"},{"id":"横断歩道橋数","type":"text"}],
  "records": [
    [1,"平成29年度",214,"20"],
    [2,"平成30年度",289,"20"],
    [3,"令和元年度",289,"20"],
    [4,"令和２年度",289,"20"],
    [5,"令和３年度",289,"…"],
    [6,"令和４年度",215,"18"],
    [7,"令和５年度",215,"18"],
    [8,"令和６年度",215,"18"]
]}