{
  "fields": [{"id":"_id","type":"int"},{"id":"年度別（年度末現在）","type":"numeric"},{"id":"加入世帯数(世帯）","type":"numeric"},{"id":"全世帯に対する割合（％）","type":"numeric"},{"id":"被保険者数（人）","type":"numeric"},{"id":"全人口に対する割合（％）","type":"numeric"}],
  "records": [
    [1,2017,63447,38,98708,24.8],
    [2,2018,61155,36.6,93765,23.8],
    [3,2019,59278,35.5,89843,23],
    [4,2020,58666,35,88069,22.8],
    [5,2021,57349,34.7,84865,22.3]
]}