{
  "fields": [{"id":"_id","type":"int"},{"id":"年度","type":"text"},{"id":"回数（回）","type":"numeric"},{"id":"参加者（人）","type":"numeric"}],
  "records": [
    [1,"27",5,179],
    [2,"28",4,95],
    [3,"29",3,95],
    [4,"30",3,91],
    [5,"元",4,235],
    [6,"2",0,0],
    [7,"3",2,24]
]}