--- service: j.root-servers.net start-period: '2015-07-04T00:00:00Z' end-period: '2015-07-04T23:59:59Z' metric: rcode-volume 0: 754277015 1: 226538 2: 336 3: 1721973882 4: 809 5: 643223 6: 131 7: 90 8: 78 9: 255 10: 1144 11: 93 12: 75 13: 83 14: 104 15: 212 16: 1