--- service: a.root-servers.net start-period: '2014-07-23T00:00:00Z' end-period: '2014-07-23T23:59:59Z' metric: rcode-volume 0: 1010148068 1: 442752 2: 1626 3: 1139038201 4: 9555 5: 907306 6: 1552 7: 1047 8: 1655 9: 2347 10: 1073 11: 1234 12: 1349 13: 655 14: 812 15: 837 16: 3