--- service: a.root-servers.net start-period: '2016-06-25T00:00:00Z' end-period: '2016-06-25T23:59:59Z' metric: rcode-volume 0: 1720423696 1: 25954621 2: 2759 3: 2905400331 4: 72598 5: 1021496 6: 2720 7: 5223 8: 2394 9: 3202 10: 2322 11: 2575 12: 3751 13: 2369 14: 3026 15: 3526 16: 16