--- service: a.root-servers.net start-period: '2016-06-16T00:00:00Z' end-period: '2016-06-16T23:59:59Z' metric: rcode-volume 0: 1957778746 1: 5101543 2: 3043 3: 3950221765 4: 1029762 5: 1064556 6: 2455 7: 2858 8: 2377 9: 11746 10: 1980 11: 3858 12: 2279 13: 2117 14: 3096 15: 2238 16: 18