{
  "fields": [{"id":"_id","type":"int"},{"id":"年度[西暦]","type":"text"},{"id":"被保険者数[人]","type":"text"}],
  "records": [
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    [4,"2021","22864"],
    [5,"2022","23781"],
    [6,null,null],
    [7,"令和5年度港区行政資料集　後期高齢者医療制度被保険者数","Ver202303"]
]}