https://www.coins.tsukuba.ac.jp/2014/%e5%85%90%e7%8e%89%e7%a5%90%e6%82%a6%e6%95%99%e6%8e%88%e3%80%81%e6%9c%b4%e6%b3%b0%e7%a5%90%e6%95%99%e6%8e%88%e3%80%81%e4%bd%90%e8%97%a4%e4%b8%89%e4%b9%85%e6%95%99%e6%8e%88%e3%81%8c%e5%84%aa%e7%a7%80.php 2014-06-20T08:56:16+00:00 monthly 0.2