--- service: j.root-servers.net start-period: '2015-07-31T00:00:00Z' end-period: '2015-07-31T23:59:59Z' metric: rcode-volume 0: 915992032 1: 1463532 2: 3490 3: 1280726028 4: 2165 5: 710907 6: 239 7: 243 8: 386 9: 307 10: 1340 11: 240 12: 193 13: 181 14: 383 15: 297