--- service: j.root-servers.net start-period: '2015-01-23T00:00:00Z' end-period: '2015-01-23T23:59:59Z' metric: rcode-volume 0: 1072697330 1: 597542 2: 6579 3: 1499533860 4: 1611 5: 546320 6: 29 7: 40 8: 73 9: 146 10: 4198 11: 52 12: 32 13: 213 14: 64 15: 170