console.log(dataLists.get("A"));
{"A1" => "3-2　国内総生産（名目GDP，米ドル表示）(1)"}
{"A3" => "国（地域）"}
{"A5" => "世界"}
{"A7" => "アジア"}
{"A8" => "日本 a"}
{"A9" => "アラブ首長国連邦"}
{"A10" => "イスラエル"}
.
.
.
.



console.log(dataLists.get("B"));
{"B3" => "1995"}
{"B5" => "31,101,723"}
{"B8" => "5,448,919"}
{"B9" => "66,603"}
{"B10" => "100,344"}
{"B11" => "3,477"}
{"B12" => "114,364"}
{"B13" => "358,024"}
{"B14" => "236,456"}
{"B15" => "20,563"}
{"B16" => "8,041"}
.
.
.
.