--- service: a.root-servers.net start-period: '2016-06-03T00:00:00Z' end-period: '2016-06-03T23:59:59Z' metric: rcode-volume 0: 1912563374 1: 744326 2: 1903 3: 4253065482 4: 899432 5: 1001055 6: 3313 7: 2930 8: 1575 9: 1496 10: 1154 11: 1994 12: 2015 13: 1373 14: 1687 15: 1801 16: 18