17 instances from 2 years 2018 - 7 instances Jan Feb Mar Apr May Jun 22 4 Jun 22, 2018 4 instances 03:23:03 03:32:05 04:14:39 21:01:02 23 3 Jun 23, 2018 3 instances 07:09:33 07:17:18 07:19:16 Jul Aug Sep Oct Nov Dec 2017 - 10 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 04:23:00 04:24:46 04:25:20 11:37:05 11:59:35 12:18:32 Jul Aug Sep Oct 2 3 Nov Dec 25 26