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 20:04:04 20:17:58 22 4 Jun 22, 2018 4 instances 04:36:29 06:28:31 10:53:54 11:06:11 Jul 7 Aug Sep Oct Nov Dec 2017 - 14 instances Jan 6 2 Jan 6, 2017 2 instances 16:42:23 16:44:57 10 Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 12:42:05 13:05:37 13:26:47 18:51:52 19:10:56 19:34:48 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 12:50:27 20:00:58 Nov 20 Dec 25 26 2016 - 8 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 2 Sep 19, 2016 2 instances 11:17:03 11:24:11 30 2 Sep 30, 2016 2 instances 20:53:01 21:00:58 Oct 3 3 Oct 3, 2016 3 instances 13:55:32 13:55:32 13:56:57 Nov Dec 29