{
  "fields": [{"id":"_id","type":"int"},{"id":"年度","type":"text"},{"id":"加入世帯数[世帯]","type":"text"},{"id":"加入者数[人]","type":"numeric"},{"id":"一世帯当り加入者数[人]","type":"numeric"}],
  "records": [
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    [2,"2018","40684",55511,1.4],
    [3,"2019","39620",53600,1.4],
    [4,"2020","38341",51616,1.3],
    [5,"2021","37528",50066,1.3],
    [6,null,null,null,null],
    [7,"令和4年度港区行政資料集　国民健康保険加入状況","Ver202203",null,null]
]}