--- service: j.root-servers.net start-period: '2015-07-22T00:00:00Z' end-period: '2015-07-22T23:59:59Z' metric: rcode-volume 0: 764698025 1: 895220 2: 1353 3: 1162436480 4: 1850 5: 606901 6: 89 7: 98 8: 120 9: 187 10: 1129 11: 97 12: 84 13: 235 14: 153 15: 153