21 instances from 3 years 2018 - 7 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 20:29:23 20:43:08 20:44:29 22 3 Jun 22, 2018 3 instances 04:47:13 11:18:27 11:30:37 23 Jul Aug Sep Oct Nov Dec 2017 - 9 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 13:06:57 13:30:43 13:51:28 19:16:15 19:35:24 19:59:06 Jul Aug Sep Oct 2 Nov Dec 25 26 2016 - 5 instances Jan Feb Mar Apr May Jun Jul Aug Sep 30 2 Sep 30, 2016 2 instances 21:35:44 21:41:31 Oct 3 2 Oct 3, 2016 2 instances 14:49:55 14:49:57 4 Nov Dec