30 instances from 4 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 7 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2018 2 instances 20:04:57 20:18:50 22 4 Jun 22, 2018 4 instances 04:36:52 10:54:44 11:07:02 23:46:39 23 Jul Aug Sep Oct Nov Dec 2017 - 14 instances Jan 6 2 Jan 6, 2017 2 instances 16:43:17 16:45:52 10 Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 12:42:55 13:06:28 13:27:37 18:52:42 19:11:45 19:35:38 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 12:51:17 20:01:47 Nov 20 Dec 25 26 2016 - 8 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 2 Sep 19, 2016 2 instances 11:17:54 11:25:02 30 2 Sep 30, 2016 2 instances 20:54:31 21:02:15 Oct 3 3 Oct 3, 2016 3 instances 13:57:21 13:57:23 13:58:42 Nov Dec 29